2023/09/16 更新

写真a

フジワラ ヒデキ
藤原 秀紀
FUJIWARA Hideki
担当
大学院理学研究科 化学専攻 教授
理学部 化学科
職名
教授
所属
理学研究院
連絡先
メールアドレス
所属キャンパス
中百舌鳥キャンパス

担当・職階

  • 大学院理学研究科 化学専攻 

    教授  2022年04月 - 継続中

  • 理学部 化学科 

    教授  2022年04月 - 継続中

取得学位

  • 博士(工学) ( 京都大学 )

  • 修士(工学) ( 京都大学 )

研究分野

  • ものづくり技術(機械・電気電子・化学工学) / 電子デバイス、電子機器  / 機能材料・デバイス

  • ナノテク・材料 / 機能物性化学  / 機能物質化学

  • ナノテク・材料 / 機能物性化学

研究キーワード

  • 物性有機化学

  • 分子性伝導体

研究概要

  • TTF-磁性遷移金属錯体を用いた磁性伝導体の開発

  • 光機能性部位を有するドナーを用いた光誘起伝導体の開発

  • 安定有機ラジカルを有するドナーを用いた磁性伝導体の開発

  • 折れ曲がった骨格を有するドナーを用いた磁性伝導体の開発

研究歴

  • 有機伝導体

    有機伝導体、磁性、構造解析、双極子モーメント、有機合成 

  • 色素増感太陽電池

    太陽電池、光電変換、光物性、色素分子、有機合成 

  • 光機能性材料

    有機伝導体、光機能性、構造解析、光伝導、有機合成 

  • 磁性伝導体

    有機伝導体、磁性、構造解析、安定有機ラジカル、有機合成 

所属学協会

  • 基礎有機化学会

    2017年06月 - 継続中   国内

  • 光化学協会

    2009年01月 - 継続中

  • 分子科学会

    2006年11月 - 継続中

  • 日本結晶学会

    2000年09月 - 2017年12月

  • 日本化学会

    1996年04月 - 継続中

  • 日本化学会

  • 基礎有機化学会

  • 分子科学会

  • 光化学協会

▼全件表示

受賞歴

  • 分子性導体チャレンジ賞 (Challenger Award 21)

    2006年06月   科学研究費特定領域研究「分子性導体」  

  • BCSJ賞

    2006年04月   日本化学会  

  • 平成15年度日本化学会進歩賞

    2004年03月   日本化学会  

職務経歴(学外)

  • 大阪公立大学大学院理学研究科 教授

    2022年04月 - 継続中

  • 大阪府立大学大学院理学系研究科 教授

    2016年04月 - 2022年03月

論文

  • A Dicyanomethyl Radical Conjugated with a Pyridylamino Group: Combining Radical-based Dynamic Covalent Chemistry and Coordination Chemistry 査読

    H. Hasegawa, D. Sakamaki, H. Fujiwara

    Angewandte Chemie - International Edition   62 ( 26 )   e202302498   2023年06月( ISSN:14337851

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    掲載種別:研究論文(学術雑誌)   国際・国内誌:国際誌  

    DOI: 10.1002/anie.202302498

    PubMed

  • A double heterohelicene composed of two benzo[b]phenothiazine exhibiting intense room-temperature circularly polarized phosphorescence 査読

    S. Tanaka, D. Sakamaki, N. Haruta, T. Sato, M. Gon, K. Tanaka, H. Fujiwara

    Journal of Materials Chemistry C   11 ( 14 )   4846 - 4854   2023年03月

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    掲載種別:研究論文(学術雑誌)   国際・国内誌:国際誌  

    DOI: 10.1039/d3tc00871a

  • Unveiling a new aspect of oxocarbons: open-shell character of 4- and 5-membered oxocarbon derivatives showing near-infrared absorption 査読

    Takeshi Maeda, Taishi Oka, Daisuke Sakamaki, Hideki Fujiwara, Naoya Suzuki, Shigeyuki Yagi, Tatsuki Konishi, Kenji Kamada

    Chemical Science   14 ( 8 )   1978 - 1985   2023年01月( ISSN:20416520

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    担当区分:責任著者   掲載種別:研究論文(学術雑誌)   国際・国内誌:国際誌  

    DOI: 10.1039/D2SC06612B

    PubMed

  • Preparation and properties of novel hetero-halogen complexes 査読

    Yuji Nishidai, Toshiki Kawabata, Kotaro Yubata, Fumiya Ota, Hiroki Takamiya, Hideki Fujiwara, Hiroshi Matsubara

    Tetrahedron   119   2022年07月( ISSN:00404020

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    掲載種別:研究論文(学術雑誌)   国際・国内誌:国際誌  

    DOI: 10.1016/j.tet.2022.132854

  • Synthesis, Photophysical and Electrochemical Properties of Bis‐Squaraine Dyes Fused on Isomeric Benzodipyrrole Central Units (Chem. Asian J. 13/2022) 査読 国際共著

    Ryuhei Sawada, Takeshi Maeda, Yuya Oda, Shigeyuki Yagi, Venugopal Karunakaran, Hideki Fujiwara, Ayyappanpillai Ajayaghosh

    Chemistry – An Asian Journal   2022年07月

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    掲載種別:研究論文(学術雑誌)   国際・国内誌:国際誌  

    DOI: 10.1002/asia.202200385

  • A dicyanomethyl radical stabilized by ferrocene: a new building block for radical-based dynamic covalent chemistry with redox activity.

    Ishimoto M, Sakamaki D, Fujiwara H

    Chemical communications (Cambridge, England)   58 ( 21 )   3553 - 3556   2022年03月( ISSN:1359-7345

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/d1cc07253f

    PubMed

  • Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors

    R. Ramazashvili, P. D. Grigoriev, T. Helm, F. Kollmannsberger, M. Kunz, W. Biberacher, E. Kampert, H. Fujiwara, A. Erb, J. Wosnitza, R. Gross, M. V. Kartsovnik

    npj Quantum Materials   6 ( 1 )   2021年12月( ISSN:2397-4648

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    掲載種別:研究論文(学術雑誌)  

    <jats:title>Abstract</jats:title><jats:p>Most of solid-state spin physics arising from spin–orbit coupling, from fundamental phenomena to industrial applications, relies on symmetry-protected degeneracies. So does the Zeeman spin–orbit coupling, expected to manifest itself in a wide range of antiferromagnetic conductors. Yet, experimental proof of this phenomenon has been lacking. Here we demonstrate that the Néel state of the layered organic superconductor <jats:italic>κ</jats:italic>-(BETS)<jats:sub>2</jats:sub>FeBr<jats:sub>4</jats:sub> shows no spin modulation of the Shubnikov–de Haas oscillations, contrary to its paramagnetic state. This is unambiguous evidence for the spin degeneracy of Landau levels, a direct manifestation of the Zeeman spin–orbit coupling. Likewise, we show that spin modulation is absent in electron-doped Nd<jats:sub>1.85</jats:sub>Ce<jats:sub>0.15</jats:sub>CuO<jats:sub>4</jats:sub>, which evidences the presence of Néel order in this cuprate superconductor even at optimal doping. Obtained on two very different materials, our results demonstrate the generic character of the Zeeman spin–orbit coupling.</jats:p>

    DOI: 10.1038/s41535-021-00309-6

  • Double Heterohelicenes Composed of Benzo[b]- and Dibenzo[b,i]phenoxazine: A Comprehensive Comparison of Their Electronic and Chiroptical Properties

    Daisuke Sakamaki, Shunya Tanaka, Katsuki Tanaka, Mayu Takino, Masayuki Gon, Kazuo Tanaka, Takashi Hirose, Daichi Hirobe, Hiroshi M. Yamamoto, Hideki Fujiwara

    The Journal of Physical Chemistry Letters   9283 - 9292   2021年09月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/acs.jpclett.1c02896

  • Organic Conductors with Narrow Bandwidth Based on 2-(Pyran-4-ylidene)-1,3-dithiole

    Takashi Shirahata, Masahide Ikeda, Hiroshi Watadzu, Hideki Fujiwara, Takashi Maruyama, Tokio Yamabe, Yohji Misaki

    Bulletin of the Chemical Society of Japan   94 ( 4 )   1331 - 1339   2021年04月( ISSN:1348-0634

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1246/bcsj.20200406

  • Organic Conductors with Narrow Bandwidth Based on 2-(Pyran-4-ylidene)-1,3-dithiole 査読

    T. Shirahata, M. Ikeda, H. Watadzu, H. Fujiwara, T. Maruyama,T. Yamabe, Y. Misaki

    Bull. Chem. Soc. Jpn. 雑誌   94 ( 4 )   1331 - 1339   2021年04月

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    共著区分:共著  

  • Synthesis and Electronic Properties of Directly Linked Dihydrodiazatetracene Dimers

    Katsuki Tanaka, Daisuke Sakamaki, Hideki Fujiwara

    Chemistry – A European Journal   27 ( 13 )   4430 - 4438   2021年03月( ISSN:1521-3765

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1002/chem.202005005

  • Synthesis and Physical Properties of Tetrathiafulvalene-8-Quinolinato Zinc(II) and Nickel(II) Complexes

    Keijiro Tsujimoto, Shinya Yamamoto, Hideki Fujiwara

    Inorganics   9 ( 2 )   11 - 11   2021年02月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.3390/inorganics9020011

  • Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors 査読

    R. Ramazashvili, P. D. Grigoriev, T. Helm, F. Kollmannsberger, M. Kunz, W. Biberacher, E. Kampert, H. Fujiwara, A. Erb, J. Wosnitza, R. Gross, M. V. Kartsovnik

    npj Quantum Materials 雑誌 Nature publishing   6   2021年02月

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    共著区分:共著  

  • Synthesis and Physical Properties of Tetrathiafulvalene-8-Quinolinato Zinc(II) and Nickel(II) Complexes 査読

    K. Tsujimoto, S. Yamamoto, H. Fujiwara

    Inorganics 雑誌 MDPI   9   2021年02月

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    共著区分:共著  

  • Synthesis and Electronic Properties of Directly Linked Dihydrodiazatetracene Dimers 査読

    K. Tanaka, D. Sakamaki, H. Fujiwara

    Chem. Eur. J. 雑誌 Wiley VCH   27   4430 - 4438   2021年01月

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    共著区分:共著  

  • Photophysical properties of 4-(5-methylthiophen-2-yl)pyridinium–cyclic enolate betaine dyes tuned by control of twisted intramolecular transfer

    Yuichiro Hayashi, Naoya Suzuki, Takeshi Maeda, Hideki Fujiwara, Shigeyuki Yagi

    New Journal of Chemistry   45 ( 22 )   9770 - 9779   2021年( ISSN:1144-0546

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    掲載種別:研究論文(学術雑誌)  

    In this paper, thienylpyridinium-cyclic enolate betaine (TPB) dyes were reported as unique skeletons of fluorescent donor-acceptor type molecules. TPB derivatives with five-membered cyclic enolates are coplanar because of the intramolecular hydrogen bond formation between the carbonyl oxygens of the cyclic enolate and the α-hydrogens of the pyridinium ring. However, a six-membered cyclic enolate leads to a pre-twisted structure due to the steric hindrance. TPB derivatives with alkylene-bridged cyclic enolates exhibited obvious fluorescence quenching through the twisted intramolecular charge transfer (TICT) process in solution. In contrast, electron-deficient cyclic enolates suppressed the TICT process, and thus relatively intense emission was observed. This report also discusses deactivation processes in the excited state of each TPB derivative by theoretical calculations to support the experimental results. These observations present a rational design strategy to control the TICT of TPB derivatives.

    DOI: 10.1039/D1NJ00714A

  • Tetrathiafulvalene‐Inserted Diphenoquinone: Synthesis, Structure, and Dynamic Redox Property

    Misaki Mitsuoka, Daisuke Sakamaki, Hideki Fujiwara

    Chemistry – A European Journal   26 ( 62 )   14144 - 14151   2020年11月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1002/chem.202002291

  • Hydrogen bond-rigidified planar squaraine dye and its electronic and organic semiconductor properties 査読

    T. Maeda, A, Liess, A. Kudzus, A.-M. Krause, M. Stolte, H. Amitani, S. Yagi, H. Fujiwara, F. Würthner

    Chem. Commun. 雑誌 Royal Society of Chemistry   56   9890 - 9893   2020年07月

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    共著区分:共著  

  • A Tetrathiafulvalene‐inserted Diphenoquinone: Synthesis, Structure and Dynamic Redox Property 査読

    M. Mitsuoka, D. Sakamaki, H. Fujiwara

    Chem. Eur. J. 雑誌 Wiley VCH   2020年06月

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    共著区分:共著  

  • Hydrogen bond-rigidified planar squaraine dye and its electronic and organic semiconductor properties.

    Maeda T, Liess A, Kudzus A, Krause AM, Stolte M, Amitani H, Yagi S, Fujiwara H, Würthner F

    Chemical communications (Cambridge, England)   56 ( 68 )   9890 - 9893   2020年( ISSN:1359-7345

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/D0CC04306K

    PubMed

  • Extreme multi-point van der Waals interactions: isolable dimers of phthalocyanines substituted with pillar-like azaacenes 査読

    H. Saeki, D. Sakamaki, H. Fujiwara, S. Seki

    Chemical Science 雑誌 Royal Society of Chemistry   10   8939 - 8943   2019年08月

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    共著区分:共著  

  • Magnetic properties of honeycomb-based spin models in verdazyl-based salts

    S. Miyamoto, Y. Iwasaki, N. Uemoto, Y. Hosokoshi, H. Fujiwara, S. Shimono, H. Yamaguchi

    Physical Review Materials   3 ( 6 )   2019年06月( ISSN:2475-9953

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/physrevmaterials.3.064410

  • Magnetic properties of honeycomb-based spin models in verdazyl-based salts 査読

    S. Miyamoto, Y. Iwasaki, N. Uemoto, Y. Hosokoshi, H. Fujiwara, S. Shimono, and H. Yamaguchi

    Phys. Rev. Materials 雑誌   3   2019年06月

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    共著区分:共著  

  • Preparation of a novel bromine complex and its application in organic synthesis

    Hideki Fujiwara

    Tetrahedron   75 ( 10 )   1398 - 1405   2019年01月( ISSN:0040-4020

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    掲載種別:研究論文(学術雑誌)   国際・国内誌:国内誌  

    Although molecular bromine (Br-2) is a useful brominating reagent, it is not easy to handle. Herein, we describe the preparation of a novel air-stable bromine complex prepared from 1,3-dimethy1-2-imidazolidinone (DMI) and Br-2, which was identified to be (DMI)(2)HBr3 by spectral and X-ray techniques. This complex was then used to brominate olefins, carbonyl compounds, and aromatics, as well as in the Hofmann rearrangement. Yields of reaction products using this complex were almost the same or superior to those using other bromine alternatives. (C) 2019 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.tet.2019.01.055

  • Preparation of a novel bromine complex and its application in organic synthesis 査読

    Y. Nishio, K. Yubata, Y. Wakai, K. Notsu, K. Yamamoto, H. Fujiwara, H. Matsubara

    Tetrahedron 雑誌 Elsevier   75   1398 - 1405   2019年01月

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    共著区分:共著  

  • Extreme multi-point van der Waals interactions: isolable dimers of phthalocyanines substituted with pillar-like azaacenes.

    Saeki H, Sakamaki D, Fujiwara H, Seki S

    Chemical science   10 ( 39 )   8939 - 8945   2019年( ISSN:2041-6520

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/C9SC01739A

    PubMed

  • Photokinetic study on remarkable excimer phosphorescence from heteroleptic cyclometalated platinum(II) complexes bearing a benzoylated 2-phenylpyridinate ligand 査読

    Okamura Naoki, Maeda Takeshi, Fujiwara Hideki, Soman Anjaly, Unni K, N. Narayanan, Ajayaghosh Ayyappanpillai, Yagi Shigeyuki

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   20 ( 1 )   542 - 552   2018年01月( ISSN:1463-9076

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/c7cp06944h

    PubMed

  • Photokinetic study on remarkable excimer phosphorescence from heteroleptic cyclometalated platinum(II) complexes bearing a benzoylated 2-phenylpyridinate ligand 査読

    N. Okamura, T. Maeda, H. Fujiwara, A. Soman, K. N. Narayanan Unni, A. Ajayaghosh, S. Yagi

    Physical Chemistry Chemical Physics 雑誌 Royal Society of Chemistry   20   542 - 552   2017年11月

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    共著区分:共著  

  • Malachite Green Derivatives for Dye-sensitized Solar Cells: Optoelectronic Characterizations and Persistence on TiO2 査読

    J.-B. Harlé, S. Arata, S. Mine, T. Kamegawa, V. T. Nguyen, T. Maeda, H. Nakazumi, H. Fujiwara

    Bull. Chem. Soc. Jpn. 雑誌 The Chemical Society of Japan   91   52 - 64   2017年10月

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    共著区分:共著  

  • Luminescence and Single-Molecule Magnet Behaviour in Lanthanide Coordination Complexes Involving Benzothiazole-Based Tetrathiafulvalene Ligands 査読

    Y. Kishi, L. Cornet, F. Pointillart, F. Riobé, B. Lefeuvre, O. Cador, B. Le Guennic, O. Maury, H. Fujiwara, L. Ouahab

    Eur. J. Inorg. Chem. 雑誌 Wiley VCH   2018   458 - 468   2017年09月

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    共著区分:共著  

  • Deep Blue Asymmetrical Cyanine Dyes. Synthesis, Spectroscopic Characterization and Ion-Specific Cooperative Adsorption at the Surface of TiO2 Anatase Nanoparticles 査読

    J.-B. Harlé, S. Mine, T. Kamegawa, V. T. Nguyen, T. Maeda, H. Nakazumi, H. Fujiwara

    J. Phys. Chem. C 雑誌 American Chemical Society   2017年07月

  • A novel symmetric TTF-pyridyl thiolato zinc complex: synthesis, characterization and crystal structure analysis.

    Okuno R, Yamaguchi M, Fujiwara H

    Dalton transactions (Cambridge, England : 2003)   46 ( 15 )   4912 - 4916   2017年04月( ISSN:1477-9226

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  • A Novel symmetric TTF-pyridyl thiolato zinc complex: Synthesis, characterization and crystal structure analysis 査読

    R. Okuno, M. Yamaguchi, H. Fujiwara

    Dalton Trans. 雑誌 Royal Society of Chemistry   46   4912 - 4916   2017年04月

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    共著区分:共著  

  • Isotopically Enriched Polymorphs of Dysprosium Single Molecule Magnets 査読

    Y. Kishi, F. Pointillart, B. Lefeuvre, F. Riobé, B. Le Guennic, S. Golhen, O. Cador, O. Maury, H. Fujiwara, L. Ouahab

    Chem. Commun. 雑誌 Royal Society of Chemistry   53   3575 - 3578   2017年03月

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    共著区分:共著  

  • New Ethylenedithio-TTF Containing a 2,2,5,5-Tetramethylpyrrolin-1-yloxyl Radical through a Vinylene Spacer and Its FeCl4– Salt - Synthesis, Physical Properties and Crystal Structure Analyses 査読

    K. Horikiri, H. Fujiwara

    Magnetochemistry 雑誌 MDPI   3   2017年02月

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    共著区分:共著  

  • Isotopically enriched polymorphs of dysprosium single molecule magnets

    Y. Kishi, F. Pointillart, B. Lefeuvre, F. Riobé, B. Le Guennic, S. Golhen, O. Cador, O. Maury, H. Fujiwara, L. Ouahab

    Chemical Communications   53 ( 25 )   3575 - 3578   2017年

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/C7CC00317J

  • Anisotropic Field Dependence of the Superconducting Transition in the Magnetic Molecular Superconductor κ-(BETS)2FeBr4 査読

    S. Fukuoka, S. Yamashita, Y. Nakazawa, T. Yamamoto, H. Fujiwara

    J. Phys. Soc. Jpn. 雑誌 日本物理学会   86   2016年12月

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    共著区分:共著  

  • Interplay between conducting and magnetic systems in the antiferromagnetic organic superconductor κ-(BETS)2FeBr4 査読

    M. V. Kartsovnik, M. Kunz, L. Schaidhammer, F. Kollmannsberger, W. Biberacher, N. D. Kushch, A. Miyazaki, H. Fujiwara

    Journal of Superconductivity and Novel Magnetism 雑誌 Springer   29   3075 - 3080   2016年10月

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    共著区分:共著  

  • Thermodynamic properties of antiferromagnetic ordered states of π−d interacting systems of κ−(BETS)2FeX4(X=Br,Cl) 査読

    S. Fukuoka, S. Yamashita, Y. Nakazawa, T. Yamamoto, H. Fujiwara, T. Shirahata, and K. Takahashi

    Phys. Rev. B 雑誌 American Physical Society   93   2016年06月

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    共著区分:共著  

  • Novel bis- and tris-cyclometalated iridium(III) complexes bearing a benzoyl group on each fluorinated 2-phenylpyridinate ligand aimed at development of blue phosphorescent materials for OLED 査読

    N. Okamura, T. Nakamura, S. Yagi, T. Maeda, H. Nakazumi, H. Fujiwara, S. Koseki

    RSC Advances 雑誌 Royal Society of Chemistry   6   51435 - 51445   2016年05月

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    共著区分:共著  

  • Novel bis- and tris-cyclometalated iridium(III) complexes bearing a benzoyl group on each fluorinated 2-phenylpyridinate ligand aimed at development of blue phosphorescent materials for OLED 査読

    Naoki Okamura, Taiyo Nakamura, Shigeyuki Yagi, Takeshi Maeda, Hiroyuki Nakazumi, Hideki Fujiwara, Shiro Koseki

    RSC ADVANCES   6 ( 56 )   51435 - 51445   2016年( ISSN:2046-2069

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    掲載種別:研究論文(学術雑誌)  

    Novel bis- and tris-cyclometalated iridium(III) complexes bearing a benzoyl group on each fluorinated 2-phenylpyridinate ligand were developed, aimed at the development of blue phosphorescent materials for organic light-emitting diodes (OLED). When acetylacetonate (acac) was employed as an ancillary ligand, the emission wavelength (lambda(PL)) of the 5'-benzoylated bis-cyclometalated complex was blue-shifted up to 479 nm (in dichloromethane at rt, emitting bluish green) in combination with fluorine substituents. Ancillary ligand replacement in the 2-(5-benzoyl-4,6-difluorophenyl)pyridinate-based bis-cyclometalated complex from acac to picolinate gave rise to a further blue shift of lPL to 464 nm, and sky-blue emission was observed. The 2-(5-benzoyl-4,6-difluorophenyl) pyridinate-based homoleptic tris-cyclometalated complex exhibited a more blue-shifted lPL at 463 nm than any other bis- and tris-cyclometalated complexes developed here, emitting sky blue with a photoluminescence quantum yield of 0.90 (in dichloromethane at rt). Using this sky-blue phosphorescent tris-cyclometalated complex as an emitting dopant, a poly(9-vinylcarbazole)-based OLED was fabricated, and excellent blue emission with a Commission Internationale de L'eclairage (CIE) chromaticity coordinate of (0.16, 0.28) was observed, where an external quantum efficiency (eta(ext)) of 1.81% was obtained. The OLED performance was drastically improved by using a solution-processed double-emitting layer device structure, and eta(ext)s of 8.55 and 7.46% were achieved for the present sky-blue phosphorescent bis-and tris-cyclometalated iridium(III) complexes, respectively (CIE chromaticity coordinates: (0.17, 0.33) and (0.17, 0.29), respectively).

    DOI: 10.1039/c6ra09385j

  • Synthesis, structure, and properties of coordination complexes based on zinc halides and TTF-pyridyl ligand 査読

    Y. Liang, X.-W. Xiao, L.-R. Meng, D.-B. Xiao, D. Zhao, L.-J. Shen, J.-H. Fang, H. Fujiwara

    Synthetic Metals 雑誌 Elsevier   203   2015年03月

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  • Single crystal growth of new heavy fermion compounds CePt2In7 and Ce2PtIn8 査読

    H. Shishido, T. Yoshihara, D. Nagamiya, S. Noguchi, H. Fujiwara, T. Ishida

    J. Phys.: Conf. Ser. 雑誌 IOP science   592   2015年

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  • Novel 10,13-disubstituted dipyrido[3,2-a:2′,3′-c]phenazines and their platinum(II) complexes: highly luminescent ICT-type fluorophores based on D–A–D structures 査読

    T. Shigehiro, S. Yagi, T. Maeda, H. Nakazumi, H. Fujiwara, Y. Sakurai

    Tetrahedron Lett. 雑誌 Elsevier   55   5195 - 5198   2014年09月

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  • Photofunctional Conductors Based on TTF-BODIPY Dyads Bearing p-Phenylene and p-Phenylenevinylene Spacers 査読

    K. Tsujimoto, R. Ogasawara, T. Nakagawa, H. Fujiwara

    Eur. J. Inorg. Chem. 雑誌 Wiley-VCH   3960 - 3972   2014年08月

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  • Self-ordering of organic-metal hybrid microstructures based on tetrathiafulvalene derivatives 査読

    X.-W. Xiao, W. Pan, Z.-Q. Wang, L.-J. Shen, J.-H. Fang, H.-Q. Gao, X. Li, H. Fujiwara

    Synth. Metals 雑誌 Elsevier   189   42 - 46   2014年03月

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  • TTF-fluorene dyads and their M(CN)2– (M = Ag, Au) salts designed for photoresponsive conducting materials 査読

    K. Tsujimoto, R. Ogasawara, Y. Kishi, H. Fujiwara

    New. J. Chem. 雑誌 Royal Society of Chemistry   38   2014年01月

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  • TTF-fluorene dyads and their M(CN)(2)(-) (M = Ag, Au) salts designed for photoresponsive conducting materials 査読

    Keijiro Tsujimoto, Reiko Ogasawara, Yosuke Kishi, Hideki Fujiwara

    NEW JOURNAL OF CHEMISTRY   38 ( 1 )   406 - 418   2014年01月( ISSN:1144-0546

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    掲載種別:研究論文(学術雑誌)  

    To explore photoresponsive conducting materials, we developed new tetrathiafulvalene (TTF)-fluorene D-A dyads with a sigma-bonded thiomethylene spacer (1a-d) or a pi-conjugated ethylene spacer (2a-b) and reported their synthesis, electrochemical and optical properties. Fluorescence studies suggested that the fluorescence from an excited fluorene part is quenched by an intramolecular electron transfer process from the electron-donating TTF part to the fluorene part, and the intramolecular interaction through the pi-conjugated ethylene spacer is stronger and shows more suppression than the non-planar sigma-bonded thiomethylene spacer. We also investigated photoelectric conversion functionality by a photoelectrochemical method using the thin films of dyads 1-2 spin-coated on ITO-coated glass substrates. We observed electric current generation that depends on the absorption spectra of thin films, suggesting that absorbed photons are converted to electric currents on the thin film/ITO electrode. Crystal structure analysis and measurement of photoconductivity of a single crystalline sample of molecule 1d having 4,5-bis(methylthio)-substituents suggest generation of photocurrents along the stacking direction of the TTF parts by the photoinduced intramolecular electron transfer and the resultant charge-separated state. Furthermore, we also reported the crystal structure analyses, photoconductivity and magnetic properties of the cation radical salts, 2b(2)M(CN)(2) (M = Ag, Au), where 2b contains a 4,5-ethylenedithio-substituent. The Ag(CN)(2) salt showed a semiconducting behaviour with a room temperature conductivity of 0.088 S cm(-1) due to a half-filled Mott insulating band structure of this crystal that originates from a strongly dimerized intermolecular interaction. Upon photoirradiation, this salt showed a slight enhancement of conductivities of ca. 14%.

    DOI: 10.1039/c3nj00979c

  • Photo- and electroluminescence from deep-red- and near-infrared-phosphorescent tris-cyclometalated iridium(III) complexes bearing largely π-extended ligands 査読

    S. Ikawa, S. Yagi, T. Maeda, H. Nakazumi, H. Fujiwara, S. Koseki, Y. Sakurai

    Inorg. Chem. Commun. 雑誌 Elsevier   38   14 - 19   2013年10月

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  • Cu(II) and Cu(I) coordination complexes involving two tetrathiafulvalene-1,3-benzothiazole hybrid ligands and their radical cation salts. 査読

    Yokota S, Tsujimoto K, Hayashi S, Pointillart F, Ouahab L, Fujiwara H

    Inorganic chemistry   52 ( 11 )   6543 - 6550   2013年06月( ISSN:0020-1669

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ic4005246

    PubMed

  • CuII and CuI Coordination Complexes Involving Two Tetrathiafulvalene-1,3-benzothiazole Hybrid Ligands and their Radical Cation Salts 査読

    S. Yokota, K. Tsujimoto, S. Hayashi, F. Pointillart, L. Ouahab, H. Fujiwara

    Inorg. Chem. 雑誌 American Chemical Society   52   6543 - 6550   2013年05月

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  • Photo-and electroluminescence from 2-(dibenzo[b, d]furan-4-yl)pyridine- based heteroleptic cyclometalated platinum(II) complexes: Excimer formation drastically facilitated by an aromatic diketonate ancillary ligand 査読

    Tatsuya Shigehiro, Shigeyuki Yagi, Takeshi Maeda, Hiroyuki Nakazumi, Hideki Fujiwara, Yoshiaki Sakurai

    Journal of Physical Chemistry C   117 ( 1 )   532 - 542   2013年01月( ISSN:1932-7447

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    掲載種別:研究論文(学術雑誌)  

    To clarify the ancillary ligand effect on excimer formation of heteroleptic cyclometalated platinum(II) complexes, we investigated photo-and electroluminescence behavior for green-phosphorescent [(dibenzo[b,d]furan-4-yl) pyridinato-N,C3′]platinum(II) 1,3-diketonates Pt-1 and Pt-2 (1,3-diketonate ancillary ligands
    1,3-bis(3,4-dibutoxyphenyl)propane-1,3- dionate (bdbp) and dipivaloylmethanate (dpm) for Pt-1 and Pt-2, respectively). The X-ray crystallographic study reveals that both Pt-1 and Pt-2 form dimeric pairs in the solid states, indicating that they are likely to form the excimers. In PMMA films doped with Pt-1, red-shifted photoluminescence at &gt
    600 nm, assignable to the excimer emission, increasingly emerges along with the original monomer emission at 516 and 552 nm as the doping level of Pt-1 is increased to 44 wt %. Pt-2-doped films give quite modest excimer-based photoluminescence even when heavily doped to the same extent as Pt-1-doped films. This clearly indicates that the aromatic ancillary ligand (bdbp) effectively facilitates the excimer formation rather than the aliphatic (dpm). Similar efficient excimer formation is also observed for electroluminescent devices such as poly(9-vinylcarbazole)-based polymer light-emitting diodes (PLEDs) doped with Pt-1. The Pt-1-doped PLEDs afford electroluminescence from green to orange when the doping level of Pt-1 is varied from 7.1 to 24 wt %. Thus, referring to the Commission Internationale de L'Eclairage (CIE) chromaticity coordinate, the color tuning is available from CIE = (0.40, 0.57) to (0.56, 0.43) (@maximum luminance). We also found that the excimer-based luminescence of Pt-1 is enhanced in the PLEDs more than in polymer thin films upon photoexcitation. This result shows the difference in the mechanism of triplet excimer formation between photo-and electroluminescence and indicates that the efficient triplet excimer formation is caused by direct charge recombination of anion and cation radicals of Pt-1. © 2012 American Chemical Society.

    DOI: 10.1021/jp307853t

  • Conformational effect of symmetrical squaraine dyes on the performance of dye-sensitized solar cells 査読

    T. Maeda, S. Mineta, H. Fujiwara, H. Nakao, S. Yagi H. Nakazumi

    J. Mater. Chem. A 雑誌 Royal Society of Chemistry   1   1303 - 1309   2013年01月

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  • Photocurrent generation based on new tetrathiafulvalene-BODIPY dyads 査読

    K. Tsujimoto, R. Ogasawara, H. Fujiwara

    Tetrahedron Lett. 雑誌 Elsevier   54   1251 - 1255   2013年01月

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  • Conformational effect of symmetrical squaraine dyes on the performance of dye-sensitized solar cells 査読

    Takeshi Maeda, Shohei Mineta, Hideki Fujiwara, Hidekazu Nakao, Shigeyuki Yagi, Hiroyuki Nakazumi

    JOURNAL OF MATERIALS CHEMISTRY A   1 ( 4 )   1303 - 1309   2013年( ISSN:2050-7488

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    掲載種別:研究論文(学術雑誌)  

    A symmetrical squaraine dye altered to possess dicyanovinylene functionality on a carbonyl group of the cyclobutene core (SQM1a) was synthesized to elucidate the effects of the conformationally locked-in cis-like form ensured by the steric repulsion of dicyanovinylenes on the performance of dye-sensitized solar cells (DSSCs) through a comparison with an unsymmetrical analogue bearing one carboxy group (SQM1b) and a standard squaraine dye (MSQ). The FT-IR spectrum of the TiO2 thin film immersed in the dye solution suggested that the linkages between the dye and TiO2 were formed by both carboxy groups symmetrically incorporated on the pi-conjugation of dyes. The symmetrical and conformationally locked structure of SQM1a brought about a decrease in the non-radiative decay rate, which may have been induced by suppression of the possible photoisomerization of squaraines. In accordance with the finding of non-radiative decay, a DSSC fabricated with SQM1a exhibited a significantly enhanced shortcircuit current density, which revealed an efficient electron injection derived from the double-anchored and conformationally locked structure of SQM1a. Consequently, the performance of DSSCs fabricated with SQM1a was higher than the performance of those fabricated with SQM1b and MSQ. This indicates that substantial advantages can be derived by restricting the conformation of symmetrical squaraine dyes.

    DOI: 10.1039/c2ta00883a

  • Photo- and Electroluminescence from 2‑(Dibenzo[b,d]furan-4-yl)pyridine-Based Heteroleptic Cyclometalated Platinum(II) Complexes: Excimer Formation Drastically Facilitated by an Aromatic Diketonate Ancillary Ligand 査読

    T. Shigehiro, S. Yagi, T. Maeda, H. Nakazumi, H. Fujiwara, Y. Sakurai

    J. Phys. Chem. C 雑誌 American Chemical Society   117   2012年11月

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  • Photoluminescence color tuning of phosphorescent bis-cyclometalated iridium(III) complexes by ancillary ligand replacement 査読

    S. Ikawa, S. Yagi, T. Maeda, H. Nakazumi, H. Fujiwara, Y. Sakurai

    Dyes and Pigm. 雑誌 Elsevier   95   695 - 705   2012年07月

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  • Structures and electrical properties of a new molecular conductor, (BSM-TTP)4(PF6)3(C6H5Cl)2 査読

    H. Tsuji, M. Yasuda, T. Shirahata, H. Fujiwara, T. Sugimoto, Y. Misaki

    Phys. Status Solidi C 雑誌 Elsevier   9   1149 - 1151   2012年04月

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  • Photoinduced Triplet States of Photoconductive TTF Derivatives Including a Fluorescent Group 査読

    K. Furukawa, Y. Sugishima, H. Fujiwara, and T. Nakamura

    Chem. Lett. 雑誌 Chemical Society of Japan   40   292 - 294   2011年03月

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  • Photoinduced Triplet States of Photoconductive TTF Derivatives Including a Fluorescent Group 査読

    Ko Furukawa, Yasuo Sugishima, Hideki Fujiwara, Toshikazu Nakamura

    CHEMISTRY LETTERS   40 ( 3 )   292 - 294   2011年03月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    The spin dynamics of photoconductive tetrathiafulvalene (TTF) derivatives containing 2,5-diphenyl-1,3,4-oxadiazole (PPD) was examined using time-resolved electron spin resonance (TR-ESR) spectroscopy. TR-ESR signals of a frozen solution sample under visible excitation were attributed to the excited triplet state T-1, which was populated via intersystem crossing from the excited singlet state S-1 as confirmed by TR-ESR spectral simulations. From DFT calculations, the spin-density distribution of the T-1 state was found to be concentrated around the linker between the TTF and PPD molecules.

    DOI: 10.1246/cl.2011.292

  • Structures and Electrical Properties of (BTM-TS-TTP)4PF6 査読

    M. Yasuda, E. Fujiwara, S. Aonuma, H. Fujiwara, T. Sugimoto, T. Nakayashiki, K. Tanaka, K. Takahashi, H. Kobayashi, Y. Misaki

    Bull. Chem. Soc. Jpn. 雑誌 Chemical Society of Japan   84   79 - 81   2011年01月

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  • Crystal structure and physical properties of a magnetic molecular conductor (EDO-TTFVODS)2FeCl4 査読

    X.-W. Xiao, J.-H. Fang, J. Zhou, H.-Q. Gao, H. Fujiwara, T. Sugimoto

    Synth. Metals 雑誌 Elsevier   160   2413 - 2416   2010年12月

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  • Development of Photofunctional Materials Using TTF derivatives Containing a 1,3-Benzothiazole Ring 査読

    H. Fujiwara, S. Yokota, S. Hayashi, S. Takemoto, H. Matsuzaka

    Physica B 雑誌 Elsevier Science Ltd.   405   S15 - S18   2010年06月

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  • New Fluorene-substituted TTF Derivatives as Photofunctional Materials 査読

    H. Fujiwara, K. Tsujimoto, Y. Sugishima, S. Takemoto, H. Matsuzaka

    Physica B 雑誌 Elsevier Science Ltd.   405   S12 - S14   2010年06月

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  • Low-temperature far-infrared absorption in the antiferromagnetic organic superconductor κ-(BETS)2FeBr4 査読

    N. Hossein Khah, G. V. Sudhakar Rao, M. Reedyk, H. Fujiwara, H. Kobayashi, T. Nakamura, K. Yakushi, M. A. Tanatar

    Phys. Rev. B 雑誌 American Physical Society   81   092508/1 - 4   2010年03月

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  • A Bimetallic Ru2Pt Complex Containing a Trigonal-Planar mu3-Cabido Ligand: Formation, Structure, and Reactivity Relevant to the Fischer-Tropsch Process 査読

    S. Takemoto, H. Morita, K. Karitani, H. Fujiwara, H. Matsuaka

    J. Am. Chem. Soc. 雑誌 American Chemical Society   131   18026 - 18027   2009年12月

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  • A bimetallic Ru2Pt complex containing a trigonal-planar mu3-carbido ligand: formation, structure, and reactivity relevant to the Fischer-Tropsch process. 査読

    Takemoto S, Morita H, Karitani K, Fujiwara H, Matsuzaka H

    Journal of the American Chemical Society   131 ( 50 )   18026 - +   2009年12月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ja907387w

    PubMed

  • Single-Molecule Junctions with Strong Molecule-lectrode Coupling 査読

    M. Taniguchi, M. Tsutsui, K. Shoji, H. Fujiwara, T. Kawai

    J. Am. Chem. Soc. 雑誌 American Chemical Society   131   14146 - 14147   2009年10月

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  • Single-molecule junctions with strong molecule-electrode coupling. 査読

    Taniguchi M, Tsutsui M, Shoji K, Fujiwara H, Kawai T

    Journal of the American Chemical Society   131 ( 40 )   14146 - +   2009年10月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ja905248e

    PubMed

  • Interconvertable Bistability in Magnetic Organic Conductors Based on Bent Donor Molecules, EDO-EDSe-TTFVS(O) 査読

    X.-F. Shao, Y. Yamaji, H. Fujiwara, T. Sugimoto

    J. Mater. Chem. 雑誌 Royal Society of Chemistry   19   5837 - 5844   2009年08月

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  • New aspects of π-d interactions in magnetic molecular conductors 査読

    T. Sugimoto, H. Fujiwara, S. Noguchi, K. Murata

    Science and Technology of Advanced Materials 雑誌 National Institute for Materials Science   10   2009年04月

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  • Interconvertible bistability in magnetic organic conductors based on bent donor molecules, EDO-EDSe-TTFVS(O) 査読

    Xiangfeng Shao, Yuhta Yamaji, Hideki Fujiwara, Toyonari Sugimoto

    JOURNAL OF MATERIALS CHEMISTRY   19 ( 32 )   5837 - 5844   2009年( ISSN:0959-9428

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    掲載種別:研究論文(学術雑誌)  

    Electrochemical oxidation of a bent donor molecule ethylenedioxy-ethylenediseleno-tetrathiafulvaleno-thioquinone-1,3-dithiolemethide (EDO-EDSe-TTFVS, 1) and the corresponding quinone derivative EDO-EDSe-TTFVO (2) in the presence of (Bu(4)N)MCl(4) (M Ga, Fe) affords single crystals of three radical cation salts, 1(2)FeCl(4), 1(2)GaCl(4), and 2(2)FeCl(4)(DCE) (DCE 1,2-dichloroethane). All of these salts exhibit semiconductor-to-semiconductor first-order phase transitions with a relatively large thermal hysteresis width (&gt;15 K). The d-spins of FeCl(4)(-) ions in both 1(2)FeCl(4) and 2(2)FeCl(4)(DCE) show relatively strong antiferromagnetic interactions with Weiss temperatures of -7.1 and -9.2 K, respectively. The antiferromagnetic interaction in both salts originates from the preferential d-pi-pi-d interaction. The crystal structures of both 1(2)FeCl(4) and 1(2)GaCl(4) are solved at 298 and 150 K, which correspond to the high- and low-temperature phases (H- and L-phases), respectively. In each phase, the crystal structures of 1(2)FeCl(4) and 1(2)GaCl(4) are isomorphous. The donor molecules in the H- and L-phases of 1(2)FeCl(4) have similar packing patterns composed of one-dimensional columns with donor dimers. The phase transition of 1(2)FeCl(4) is accompanied by a slight orientational change of donor molecules in a dimer, and the electron correlation is enhanced on cooling. On the basis of the "molecular coordinates&apos;&apos;, the effect of the molecular rotation on the electronic phase transition is discussed. The results indicate that a slight molecular rotation can give rise to a significant change of electron correlation even in an electronic system with strong intermolecular interactions.

    DOI: 10.1039/b904061g

  • Synthesis, structure and photoelectrochemical properties of new tetrathiafulvalene-diphenyl-1,3,4-oxadiazole dyads 査読

    H. Fujiwara, Y. Sugishima, K. Tsujimoto

    Tetrahedron Lett. 雑誌 Elsevier Science Ltd.   49   7200 - 7203   2008年12月

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  • Negative magnetoresistance in an antiferromagnetic metal β''-(EDO-TTFVODS)2 FeBr4(DCE)0.5 査読

    Y.-F. Weng, H. Yoshino, H. Fujiwara, T. Sugimoto, K. Murata

    Solid State Sciences 雑誌 Elsevier Science Ltd.   10   1745 - 1748   2008年12月

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  • Synthesis, Synthesis, structure and physical properties of a new TTF derivative containing a PPD part 査読

    H. Fujiwara, Y. Sugishima, K. Tsujimoto

    J. Phys.: Conf. Ser. 雑誌 IOP Publishing   132   012025 - 5   2008年10月

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  • ESR study on molecular salt (Benzo-TTFVS)<inf>2</inf>MBr<inf>4</inf> (M = Fe, Ga)

    Shuichi Kawamata, Takekazu Ishida, Taro Hayakawa, Takashi Hiraoka, Hideki Fujiwara, Toyonari Sugimoto

    Journal of the Korean Physical Society   53 ( 9(2) )   1014 - 1019   2008年08月( ISSN:0374-4884

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    掲載種別:研究論文(学術雑誌)  

    Electron spin resonance (ESR) experiments on (Benzo-TTFVS) 2MBr4 (M = Fe, Ga) have been done with 15.4 GHz microwaves, where Benzo-TTFVS denotes a new donor molecule substituted with a benzo group, benzotetrathiafulvalenothioquinone-l,3-dithiolemethide. The temperature and the magnetic-field-direction dependencies of the effective g-value and the linewidth are obtained. In (Benzo-TTFVS)2GaBr 4 (Ga salt), the ESR signals are due to π-electrons while they originate from d-electrons at the Fe3+ ion in the case of (Benzo-TTFVS)2FeBr4 (Fe salt). The g-value and the linewidth for the direction of the π-d correlation are different from those for other directions in the Fe salt. A strong antiferromagnetic fluctuation related to the π-d correlation is observed in the Fe salt. On the other hand, in the Ga salt, the magnetic-field-direction dependencies of the g-value and the linewidth reflect the anisotropy of the one-dimensional conduction band. The importance of the π-d correlation is proved by comparing the ESR results for the Fe salt with those for the Ga salt.

    DOI: 10.3938/jkps.53.1014

  • Fe2OCl62? Salt Formed by Electrochemical Oxidation of Ethylenedioxytetrathiafulvalenoquinone-1,3-dithiolemethide in the Presence of FeCl4? Ion with a Silicon Wafer Electrode 査読

    T. Koike, S. Yokota, H. Fujiwara, T. Sugimoto, S. Noguchi, D. de Caro, L. Valade

    Inorg. Chem. 雑誌 American Chemical Society   47   7074 - 7076   2008年08月

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  • Fe2OCl6(2-) salt formed by electrochemical oxidation of ethylenedioxytetrathiafulvalenoquinone-1,3-dithiolemethide in the presence of FeCl4- ion with a silicon wafer electrode. 査読

    Koike T, Yokota S, Fujiwara H, Sugimoto T, Noguchi S, de Caro D, Valade L

    Inorganic chemistry   47 ( 16 )   7074 - 7076   2008年08月( ISSN:0020-1669

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ic8006487

    PubMed

  • Novel Sulfur-Selenium Exchange in Ethylenedioxy- and Ethylenedithiodithiadiselenafulvalenedithiolates 査読

    T. Hayashi, X.-W. Xiao, Y. Yamaji, H. Fujiwara, T. Sugimoto, H. Nakazumi

    Chem. Lett. 雑誌 Chemical Society of Japan   37   428 - 429   2008年04月

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    共著区分:共著  

  • Structures and electrical properties of beta- and theta-(BTM-TTP)(2)SbF6 査読

    Manami Noda, Misaki Yasuda, Yoshiaki Nakano, Akihiro Ito, Hiroyuki Fueno, Kazuyoshi Tanaka, Hideki Fujiwara, Toyonari Sugimoto, Yohji Misaki

    CHEMISTRY LETTERS   37 ( 4 )   396 - 397   2008年04月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    Two kinds of (BTM-TTP)(2)SbF6 salts, where BTM-TTP is 2-[4,5-bis(methylthio)-1,3-dithiol-2-ylidene]-5-(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene, have been prepared. X-ray structure analyses have revealed that needle-like and plate-like crystals have the so-called beta- and theta-type arrays of the donors, respectively. The beta-type salt exhibits metallic conducting behavior down to 5 K, while the theta-type salt is a semiconductor even at room temperature.

    DOI: 10.1246/cl.2008.396

  • Novel sulfur-selenium exchange in ethylenedioxydithiadiselenafulvalenedithiolates and ethylenedithiodithiadiselenafulvalenedithiolates 査読

    Toshiki Hayashi, Xunwen Xiao, Yuhta Yamaji, Hideki Fujiwara, Toyonari Sugimoto, Hiroyuki Nakazumi

    CHEMISTRY LETTERS   37 ( 4 )   428 - 429   2008年04月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    Ethylenedioxy- and ethylenedithiodithiadiselenafulvalenedithiolates are subjected to sulfur-selenium exchange, in which one selenium atom in the molecular skeleton is replaced by an outside sulfur atom. The reaction of the exchanged dithiolates with 2-methylthio-1,3-dithiolylium ion gives the corresponding thioquinone-1,3-dithiolemethides as new donor molecules.

    DOI: 10.1246/cl.2008.428

  • Structures and Electrical Properties of beta- and theta-(BTM-TTP)2SbF6 査読

    M. Noda, M. Yasuda, Y. Nakano, A. Ito, H. Fueno, K. Tanaka, H. Fujiwara, T. Sugimoto, Y. Misaki

    Chem. Lett. 雑誌 Chemical Society of Japan   37   396 - 397   2008年03月

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  • Conducting Dimerized Cobalt Complexes with Tetrathiafulvalene (TTF) Dithiolate Ligands 査読

    E. Fujiwara, K. Hosoya, A. Kobayashi, H. Tanaka, M. Tokumoto, Y. Okano, H. Fujiwara, H. Kobayashi, Y. Fujishiro, E. Nishibori, M. Takata, M. Sakata

    Inorg. Chem. 雑誌 American Chemical Society   47   863 - 874   2008年02月

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  • Conducting dimerized cobalt complexes with tetrathiafulvalene dithiolate ligands. 査読

    Fujiwara E, Hosoya K, Kobayashi A, Tanaka H, Tokumoto M, Okano Y, Fujiwara H, Kobayashi H, Fujishiro Y, Nishibori E, Takata M, Sakata M

    Inorganic chemistry   47 ( 3 )   863 - 874   2008年02月( ISSN:0020-1669

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ic701100r

    PubMed

  • Evidence for strong pi-d Interaction in beta-(EDT-DSDTFVSDS)2FeBr4 査読

    T. Fujimoto, S. Yasuzuka, K. Yokogawa, H. Yoshino, T. Hayashi, H. Fujiwara, T. Sugimoto, K. Murata

    J. Phys. Soc. Jpn. 雑誌 日本物理学会   77   2008年01月

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  • New pi-Electron Donors with a 2,2,5,5-Tetramethylpyrrolin-1-yloxyl Radical Designed for Magnetic Molecular Conductors 査読

    E. Fujiwara, S. Aonuma, H. Fujiwara, T. Sugimoto, Y. Misaki

    Chem. Lett. 雑誌 Chemical Society of Japan   37   84 - 85   2008年01月

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  • New pi-electron donors with a 2,2,5,5-tetramethylpyrrolin-1-yloxyl radical designed for magnetic molecular conductors 査読

    Emiko Fujiwara, Shuji Aonuma, Hideki Fujiwara, Toyonari Sugimoto, Yohji Misaki

    CHEMISTRY LETTERS   37 ( 1 )   84 - 85   2008年01月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    For the development of magnetic molecular conductors, we succeeded in the synthesis of new pi-electron donors containing TTF (tetrathiafulvalene) or TTP (tetrathiapentalene) framework and a stable 2,2,5,5-tetramethylpyrrolin-1-yloxyl radical within a molecule and clarified the crystal structure and physical properties of these donors. We also discuss the conducting and magnetic properties of a TCNQF(4) complex of the synthesized TTF type donor.

    DOI: 10.1246/cl.2008.84

  • Weak Ferromagnetism in a Semiconducting (ethylenedithiodiselenadithiafulvalenoquinone-1,3-diselenolemethide)2FeBr4 Salt 査読

    T. Hayashi, X.-W. Xiao, H. Fujiwara, T. Sugimoto, H. Nakazumi, S. Noguchi, H. Aruga-Katori

    Inorg. Chem. 雑誌 American Chemical Society   46   8478 - 8480   2007年10月

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  • An Antiferromagnetic Molecular Metal Based on a New Bent-Donor Molecule 査読

    X.-W. Xiao, T. Hayashi, H. Fujiwara, T. Sugimoto, S. Noguchi, Y. Weng, H. Yoshino, K. Murata, H. Aruga-Katori

    J. Am. Chem. Soc. 雑誌 American Chemical Society   129   12618 - 12619   2007年10月

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  • Weak ferromagnetism in a semiconducting (ethylenedithiodiselena- dithiafulvalenoquinone-1,3-diselenolemethide)2.FeBr4 salt. 査読

    Hayashi T, Xiao X, Fujiwara H, Sugimoto T, Nakazumi H, Noguchi S, Katori HA

    Inorganic chemistry   46 ( 21 )   8478 - 8480   2007年10月( ISSN:0020-1669

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ic701260p

    PubMed

  • An antiferromagnetic molecular metal based on a new bent-donor molecule. 査読

    Xiao X, Hayashi T, Fujiwara H, Sugimoto T, Noguchi S, Weng Y, Yoshino H, Murata K, Katori HA

    Journal of the American Chemical Society   129 ( 42 )   12618 - +   2007年10月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ja074840q

    PubMed

  • New TTF and bis-TTF containing thiophene units: Electrical properties of the resulting salts 査読

    T. Abbaz, A.-K. Gouasmia, H. Fujiwara, T. Hiraoka, T. Sugimoto, M. Taillefer, J.-M. Fabre

    Synth. Met. 雑誌 Elsevier Science Ltd.   157   508 - 516   2007年07月

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  • Nanowires of molecule-based charge-transfer salts 査読

    J.-P. Savy, D. de Caro, C. Faulmann, L. Valade, M. Almeida, T. Koike, H. Fujiwara, T. Sugimoto, J. Fraxedas, T. Ondar

    New J. Chem. 雑誌 Royal Society of Chemistry   31   519 - 527   2007年04月

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  • Antiferromagnetic or Canted Antiferromagnetic Orderings of Fe(III) d Spins of FeX4- Ions in BEDT-TTFVO(S)FeX4 (X = Cl, Br) [BEDT-TTFVO(S) = bis(ethylenedithio)tetrathiafulvalenoquinone(-thioquinone)-1,3-dithiolemethide 査読

    M.-X. Wang, X.-W. Xiao, H. Fujiwara, T. Sugimoto, S. Noguchi, T. Ishida, T. Mori, H. Aruga-Katori

    Inorg. Chem. 雑誌 American Chemical Society   46   3049 - 3056   2007年04月

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  • Metal-semiconductor structural phase transitions and antiferromagnetic orderings in (Benzo-TTFVO)2MX4 (M = Fe, Ga; X = Cl, Br) salts 査読

    T. Hiraoka, H. Fujiwara, T. Sugimoto, H. Nakazumi, S. Noguchi, A. Kuribayashi, T. Ishida, K. Yokogawa, K. Murata, T. Mori, H. Aruga-Katori, S. Kimura, M. Hagiwara

    J. Mater. Chem. 雑誌 Royal Society of Chemistry   17   1664 - 1673   2007年04月

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  • Antiferromagnetic or canted antiferromagnetic orderings of Fe(III) d spins of FeX4- ions in BEDT-TTFVO(S).FeX4 (X = Cl, Br) [BEDT-TTFVO(S) = bis(ethylenedithio)tetrathiafulvalenoquinone(-thioquinone)-1,3-dithiolemethide]. 査読

    Wang M, Xiao X, Fujiwara H, Sugimoto T, Noguchi S, Ishida T, Mori T, Katori HA

    Inorganic chemistry   46 ( 8 )   3049 - 3056   2007年04月( ISSN:0020-1669

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ic0617700

    PubMed

  • Magnetic orderings of Fe3+ d spins in the 1:1 salts of BEDT-TTFVS(O) with FeX4 査読

    S. Noguchi, A. Kuribayashi, M.-X. Wang, H. Fujiwara, T. Sugimoto, T. Ishida

    J. Mag. Mag. Mater. 雑誌 Elsevier   310   1087 - 1089   2007年03月

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  • ESR study on π 査読

    T. Hayakawa, S. Kawamata, T. Hiraoka, H. Fujiwara, T. Sugimoto, T. Ishida

    J. Mag. Mag. Mater. 雑誌 Elsevier   310   1096 - 1098   2007年03月

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  • Shubnikov 査読

    M. Teramura, S. Yasuzuka, H. Yoshino, K. Yokogawa, T. Sasaki, H. Fujiwara, T. Sugimoto, T. Hiraoka, T. Hayashi, K. Murata

    J. Mag. Mag. Mater. 雑誌 Elsevier   310   1093 - 1095   2007年03月

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  • Occurrence of a rare 49-66 structural topology, chirality, and weak ferromagnetism in the [NH4][MII(HCOO)3] 査読

    Z.-M. Wang, B. Zhang, K. Inoue, H. Fujiwara, T. Otsuka, H. Kobayashi, M. Kurmoo

    Inorg. Chem. 雑誌 American Chemical Society   46   437 - 445   2007年01月

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  • Magnetic Conductors Based on New Ethylenedioxy-Substituted Donors with a Bent Molecular Structure 査読

    H. Fujiwara, K. Wada, T. Hiraoka, T. Hayashi, T. Sugimoto, H. Nakazumi, M. Teramura, K. Yokogawa, S. Yasuzuka, K. Murata

    Multifunctional Conducting Molecular materials 著書 Royal Society of Chemistry   79   161 - 164   2007年01月

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  • Occurrence of a rare 4(9).6(6) structural topology, chirality, and weak ferromagnetism in the [NH4][MII(HCOO)3] (M = Mn, Co, Ni) frameworks. 査読

    Wang Z, Zhang B, Inoue K, Fujiwara H, Otsuka T, Kobayashi H, Kurmoo M

    Inorganic chemistry   46 ( 2 )   437 - 445   2007年01月( ISSN:0020-1669

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  • Nanowires of molecule-based charge-transfer salts 査読

    Jean-Philippe Savy, Dominique de Caro, Christophe Faulmann, Lydie Valade, Manuel Almeida, Tadahiro Koike, Hideki Fujiwara, Toyonari Sugimoto, Jordi Fraxedas, Thierry Ondarcuhu, Claude Pasquier

    NEW JOURNAL OF CHEMISTRY   31 ( 4 )   519 - 527   2007年( ISSN:1144-0546

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    掲載種別:研究論文(学術雑誌)  

    Nanowires of molecule-based charge-transfer salts are prepared using two different processing techniques. Isolated [TTF][TCNQ] nanowires are grown by a simple adsorption in organic solution method on stainless steel conversion coatings, used as substrates. They are characterized by Raman spectroscopy and current - voltage measurements. Nanowire films of Per(2)[Au(mnt)(2)] and (EDT-TTFVO)(4)(FeCl(4))(2) are electrodeposited on ( 001)- oriented silicon wafers, used as anodes. In the second case, growth as nanowires occurs after functionalizing the Si electrode with a phospholipidic membrane. Electrodeposited nanowire films are studied by various techniques, including electron microscopy, vibrational spectroscopies, X-ray photoelectron spectroscopy and conductivity measurements.

    DOI: 10.1039/b618241k

  • Metal-semiconductor structural phase transitions and antiferromagnetic orderings in (Benzo-TTFVO)(2)center dot MX4 (M = Fe, Ga; X = Cl, Br) salts 査読

    Takashi Hiraoka, Hideki Fujiwara, Toyonari Sugimoto, Hiroyuki Nakazumi, Satoru Noguchi, Akihiro Kuribayashi, Takekazu Ishida, Keiichi Yokogawa, Keizo Murata, Takehiko Mori, Hiroko Aruga-Katori, Shojiro Kimura, Masayuki Hagiwara

    JOURNAL OF MATERIALS CHEMISTRY   17 ( 17 )   1664 - 1673   2007年( ISSN:0959-9428

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    掲載種別:研究論文(学術雑誌)  

    Crystals of the 2 : 1 salts of a new donor molecule, benzotetrathiafulvalenoquinone-1,3-dithiolemethide ( 4, Benzo-TTFVO) with magnetic FeX4- and non-magnetic GaX4- ( X = Cl, Br) ions, 4(2) center dot FeX4 and 4(2) center dot GaX4, are isostructural to each other and showed a beta-type packing of the donor molecules where they form a uniform-stacked structure with an interplanar distance of 3.50 angstrom. These salts exhibited metallic behavior down to 140 - 170 K, but at these temperatures (similar to TM-I) an abrupt increase in the resistivities (rho) occurred and thereafter semiconducting behavior with an activation energy of 40 - 100 meV was observed. A structural change in the donor column from uniform to tetramer-unit stacks was observed in the 4(2) center dot FeBr4 crystal before and after TM-I. By application of pressures up to 1.0 GPa, the metallic behavior in the higher temperature region was gradually strengthened and TM-I gradually became lower with increasing pressure, but the transitions could not be suppressed at all. In response to the metal semiconductor transition at TM-I, there was a sharp decrease in the paramagnetic susceptibility of the pi electron system, where the transition from Pauli paramagnetism due to the metal-conducting behavior to the spin singlet state caused by tetramer formation of the donor molecules was observed. In addition, the FeX4- ( X = Cl, Br) salts showed comparatively strong antiferromagnetic interactions between the Fe( III) d spins of the FeCl4- and FeBr4- ions ( Weiss temperature: -11 K for 4(2) center dot FeCl4 and -37 K for 4(2) center dot FeBr4), giving rise to antiferromagnetic orderings at 1.6 K for 4(2) center dot FeCl4 and 9.3 K for 4(2) center dot FeBr4. The magnitudes of the d - d and pi - d interactions in 4(2) center dot FeBr4 are calculated to be J(dd) = 2.06 K and J(pi d) = 2.32 K, respectively. The comparison of these J values with the other magnetic conductors based on our system suggests that the d - d interaction of 4(2) center dot FeBr4 is stronger than the pi - d interaction. Since the three-dimensional antiferromagnetic ordering appears at the comparatively high temperature of 9.3 K, there is an important contribution of the pi electrons to the antiferromagnetic ordering of the Fe( III) d spins in order to mediate the magnetic interaction between two-dimensional magnetic anion layers.

    DOI: 10.1039/b612053a

  • High field magnetization of (Benzo-TTFVS)2FeBr4 and (Benzo-TTFVO)2FeBr4 査読

    S. Noguchi, A. Kuribayashi, T. Hiraoka, H. Fujiwara, T. Sugimoto, S. Kimura, M. Hagiwara, K. Kindo, T. Ishida

    Journal of Physics: Conference Series 雑誌 IOP Publishing   51   331 - 334   2006年12月

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  • Isotropic magnetoresistance anomaly in the antiferromagnetic anisotropic conductor, b 査読

    M. Teramura, S. Yasuzuka, H. Yoshino, T. Sasaki, H. Fujiwara, T. Sugimoto, T. Hiraoka, T. Hayashi, K. Murata

    Journal of Physics: Conference Series 雑誌 IOP Publishing   51   367 - 370   2006年12月

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  • Magnetic ground state of quasi-two-dimensional organic conductor, t-(EDO-S,S-DMEDT-TTF)2(AuCl2)1+y 査読

    T. Nakanishi, S. Yasuzuka, H. Yoshino, H. Fujiwara, T. Sugimoto, Y. Nishio, K .Kajita, G. A. Anyfantis, G. C. Papavassiliou, K. Murata

    Journal of Physics: Conference Series 雑誌 IOP Publishing   51   343 - 346   2006年12月

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  • A New Ferromagnetic Organic Semiconductor BEDT-TTFVS-FeBr4 査読

    S. Noguchi, T. Kosaka, M. Wang, H. Fujiwara, T. Sugimoto, T. Ishida

    AIP Conf. Proc. 著書 American Institute of Physics   850   1063 - 1064   2006年09月

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  • A Metallic (EDT-DSDTFVSDS)2FeBr4 Salt: Antiferromagnetic Ordering of d Spins of FeBr4- Ions and Anomalous Magnetoresistance due to Preferential pi-d Interaction 査読

    T. Hayashi, X.-W. Xiao, H. Fujiwara, T. Sugimoto, H. Nakazumi, S. Noguchi, T. Fujimoto, S. Yasuzuka, H. Yoshino, K. Murata, T. Mori, H. Aruga-Katori

    J. Am. Chem. Soc. 雑誌 American Chemical Society   128   11746 - 11747   2006年09月

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  • Fermi Surface and Electronic Properties of kappa-(BETS)2FeCl4 査読

    T. Konoike, S. Uji, T. Terashima, M. Nishimura, T. Yamaguchi, K. Enomoto, H. Fujiwara, B. Zhang, H. Kobayashi

    AIP Conf. Proc. 著書 American Institute of Physics   850   621 - 622   2006年09月

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  • A metallic (EDT-DSDTFVSDS)2.FeBr4 salt: antiferromagnetic ordering of d spins of FeBr4- ions and anomalous magnetoresistance due to preferential pi-d interaction. 査読

    Hayashi T, Xiao X, Fujiwara H, Sugimoto T, Nakazumi H, Noguchi S, Fujimoto T, Yasuzuka S, Yoshino H, Murata K, Mori T, Aruga-Katori H

    Journal of the American Chemical Society   128 ( 36 )   11746 - 11747   2006年09月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ja064307v

    PubMed

  • Magnetoresistance Effects Evidencing the pi-d Interaction in Metallic Organic Conductors, (EDT-DSDTFVO)2MX4 (M = Fe, Ga; X = Cl, Br) 査読

    H. Fujiwara, T. Hayashi, T. Sugimoto, H. Nakazumi, S. Noguchi, L. Li, K. Yokogawa, S. Yasuzuka, K. Murata, T. Mori

    Inorg. Chem. 雑誌 American Chemical Society   45   5712 - 5714   2006年07月

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  • Magnetoresistance effects evidencing the pi-d interaction in metallic organic conductors, (EDT-DSDTFVO)2*MX4 (M = Fe, Ga; X = Cl, Br). 査読

    Fujiwara H, Hayashi T, Sugimoto T, Nakazumi H, Noguchi S, Li L, Yokogawa K, Yasuzuka S, Murata K, Mori T

    Inorganic chemistry   45 ( 15 )   5712 - 5714   2006年07月( ISSN:0020-1669

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ic060034t

    PubMed

  • Compensation of effective field in the field-induced superconductor kappa-(BETS)2FeBr4 observed by 77Se NMR 査読

    S. Fujiyama, M. Takigawa, J. Kikuchi, H-B. Cui, H. Fujiwara, H. Kobayashi

    Phys. Rev. Lett. 雑誌 Americal Physical Society   96   2006年05月

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  • BDT-TTP-Based pi-Conductors Containing Divalent Magnetic and Non-Magnetic Inorganic Anions, [MIICl4]2- (M = Co, Mn, Zn) 査読

    T. Kusamoto, E. Fujiwara, A. Kobayashi, H. Cui, T. Otsuka, Y. Okano, H. Fujiwara, and H. Kobayashi

    Bull. Chem. Soc. Jpn. 雑誌 日本化学会   79   527 - 536   2006年04月

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  • BDT-TTP-Based pi conductors containing divalent magnetic and non-magnetic inorganic anions, [(MCl4)-Cl-II](2-) (M = Co, Mn, Zn) 査読

    Tetsuro Kusamoto, Emiko Fujiwara, Akiko Kobayashi, Hengbo Cui, Takeo Otsuka, Yoshinori Okano, Hideki Fujiwara, Hayao Kobayashi

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   79 ( 4 )   527 - 536   2006年04月( ISSN:0009-2673

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    掲載種別:研究論文(学術雑誌)  

    Three BDT-TTP [2,5-bis(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene] salts, (BDT-TTP)(3)[(MCl4)-Cl-II](EtOH)(x) (M = Co, Mn, and Zn; x approximate to 1.0) were prepared. These salts are almost isostructural to one another. The crystals are composed of BDT-TTP columns, "BDT-TTP tapes" that occupy the interstitial positions between BDT-TTP columns [(MCl4)-Cl-II](2-) anions and the crystal solvents, respectively. These salts showed weakly metallic conducting behavior down to about 150 K. At low temperature, the resistivities increased gradually with decreasing temperature, but the systems retained fairly high conductivities even at around 30 K. The [Z(II)Cl(4)](2-) salt indicated temperature independent paramagnetism down to low temperature. While the susceptibilities of the [(CoCl4)-Cl-II](2-) and [(MnCl4)-Cl-II](2-) salts showed the coexistence of pi conduction electrons and localized high-spins of the magnetic Co-II and Mn-II atoms. no significant pi-d interaction was observed. Band structure calculations were performed with taking account of the possibility of inhomogeneous distribution of pi electrons over the crystallographically independent three BDT-TTP molecules. The system has wide and narrow one-dimensional bands that originate from BDT-TTP columns and tapes, respectively. However, due to the interaction between BDT-TTP columns and tapes, the system gave a unique two-dimensional electronic band. The calculated energy dispersion curves were consistent with the weakly metallic behavior of the systems.

    DOI: 10.1246/bcsj.79.527

  • Anomalous Magnetic-Field-Hysteresis of Quantum Oscillations in k-(BETS)2FeBr4 査読

    T. Konoike, S. Uji, T. Terashima, M. Nishimura, T. Yamaguchi, K. Enomoto, H. Fujiwara, B. Zhang, and H. Kobayashi

    J. Low Temp. Phys. 雑誌 Springer   142   527 - 530   2006年02月

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  • An Antiferromagnetic Semiconductor Based on Ethylenedioxytetrathiafulvalenothioquinone-1,3-dithiolemethide, (EDO-TTFVS)FeBr4 査読

    H. Fujiwara, K. Wada, T. Hiraoka, T. Hayashi, T. Sugimoto, H. Nakazumi

    J. Low Temp. Phys. 雑誌 Springer   142   401 - 404   2006年02月

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  • Magnetic Ion Salts Using Selenium Analogues of a New Donor Molecule, Benzotetrathiafulvalenothioquinone-1,3-dithiolemethide 査読

    T. Hiraoka, H. Fujiwara, T. Sugimoto, L. Li, Y. Weng, K. Yokogawa, K. Murata

    J. Low Temp. Phys. 雑誌 Springer   142   433 - 436   2006年02月

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  • Evidence for the pi-d Interaction Comparing Magneto- resistance in (EDT- DSDTFVO)2X, X=FeCl4, GaCl4 査読

    L. Li, S. Yasuzuka, Y. Weng, K. Yokogawa, T. Fujimoto, T. Sugimoto, H. Fujiwara, T. Hayashi, T. Hiraoka, K. Murata

    J. Low Temp. Phys. 雑誌 Springer   142   469 - 472   2006年02月

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  • Field-Induced Anomaly in the Magnetoresistance of (EDO-TTFVO)2FeCl4 below 1.5 K 査読

    M. Teramura, K. Yokogawa, S. Yasuzuka, T. Sasaki, K. Wada, T. Hiraoka, T. Hayashi, H. Fujiwara, T. Sugimoto, K. Murata

    J. Low Temp. Phys. 雑誌 Springer   142   485 - 489   2006年02月

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  • Pressure Effect on Insulating State in Ferrimagnetic pi-d System (EDT-TTFVO)2FeBr4 査読

    T. Fujimoto, S. Yasuzuka, K. Yokogawa, T. Hayashi, T. Hiraoka, H. Fujiwara, T. Sugimoto, M. Hedo, Y. Uwatoko, K. Murata

    J. Low Temp. Phys. 雑誌 Springer   142   613 - 616   2006年02月

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  • Magnetic Organic Conductor Based on a pi Donor with a Stable Radical and a Magnetic Anion - A Step to Magnetic Organic Metals with Two Kinds of Localized Spin Systems 査読

    S. Otsubo, H.-B. Cui, H.-J. Lee, H. Fujiwara, K. Takahashi, Y. Okano, H. Kobayashi

    Chem. Lett. 雑誌 Chemical Society of Japan   35   130 - 131   2006年01月

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  • A magnetic organic conductor based on a pi donor with a stable radical and a magnetic anion - A step to magnetic organic metals with two kinds of localized spin systems 査読

    S Otsubo, HB Cui, HJ Lee, H Fujiwara, K Takahashi, Y Okano, H Kobayashi

    CHEMISTRY LETTERS   35 ( 1 )   130 - 131   2006年01月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    (TTP-PROXYL)FeCl4, where TTP-PROXYL is 2,5-bis(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene (TTP) incorporating the 2,2,5,5-tetramethyl-1-pyrrolidinyloxy (PROXYL) radical, is a semiconductor with two kinds of localized spin systems, that is, the systems of organic radical spins and 3d spins of magnetic FeCl4- ions. The 7 spin of the TTP-PROXYL radical cation disappears due to dimerization but the chi T-value of 4.65 Kemu mol(-1) indicates the coexistence of high-spin Fe3+ (S = 5/2) and PROXYL radical (S = 1/2) ill this salt. (TTP-PROXYL)GaCl4 is isostructural to the FeCl4 salt and exhibited similar semiconducting properties.

    DOI: 10.1246/cl.2006.130

  • A new ferromagnetic organic semiconductor (BEDT-TTFVS)center dot FeBr4 査読

    Noguchi Satoru, Kosaka Tomoyuki, Wang Mingxing, Fujiwara Hideki, Sugimoto Toyonari, Ishida Takekazu

    LOW TEMPERATURE PHYSICS, PTS A AND B   850   1063 - +   2006年( ISSN:0094-243X

  • Fermi surface and electronic properties of kappa-(BETS)2FeCl4 査読

    T. Konoike, S. Uji, T. Terashima, M. Nishimura, T. Yamaguchi, K. Enomoto, H. Fujiwara, B. Zhang, H. Kobayashi

    LOW TEMPERATURE PHYSICS, PTS A AND B   850   621 - +   2006年( ISSN:0094-243X

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    掲載種別:研究論文(国際会議プロシーディングス)  

    Shubnikov-de Haas (SdH) and angular dependent magnetoresistance oscillations are measured in the organic conductor kappa-(BETS)(2)FeCl4. This salt has a quasi-two dimensional Fermi surface, which is almost consistent with the band structure calculation. The SdH oscillations suggest the presence of a large internal field of 10.6 T. The ratio of the interlayer to intralayer transfer integral is estimated as 1/146 from the width of the coherence peak.

  • Estimation of pid-interactions in magnetic molecular conductors 査読

    T. Mori, M. Katsuhara, H. Akutsu, K. Kikuchi, J. Yamada, H. Fujiwara, T. Matsumoto, T. Sugimoto

    Polyhedron 雑誌 Elsevier Science Ltd.   24   2315 - 2320   2005年11月

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  • Stable Metallic Behavior and Antiferromagnetic Ordering of Fe(III) d Spins in (EDO-TTFVO)2FeCl4 査読

    H. Fujiwara, K. Wada, T. Hiraoka, T. Hayashi, T. Sugimoto, H. Nakazumi, K. Yokogawa, M. Teramura, S. Yasuzuka, K. Murata, T. Mori

    J. Am. Chem. Soc. 雑誌 American Chemical Society   127   14166 - 14167   2005年10月

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  • Stable metallic behavior and antiferromagnetic ordering of Fe(III) d spins in (EDO-TTFVO)2.FeCl4. 査読

    Fujiwara H, Wada K, Hiraoka T, Hayashi T, Sugimoto T, Nakazumi H, Yokogawa K, Teramura M, Yasuzuka S, Murata K, Mori T

    Journal of the American Chemical Society   127 ( 41 )   14166 - 14167   2005年10月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ja055263d

    PubMed

  • Metallic/semiconducting behaviors and an antiferromagnetic ordering of FeBr4- d spins in (Benzo-TTFVS)2MX4 (M = Fe, Ga; X = Cl, Br) 査読

    T. Hiraoka, Y. Kamada, T. Matsumoto, H. Fujiwara, T. Sugimoto, S. Noguchi, T. Ishida, H. Nakazumi and H. Aruga Katori

    J. Mater. Chem. 雑誌 American Chemical Society   15   3479 - 3487   2005年09月

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  • Fermi surface reconstruction in the magnetic-field-induced superconductor kappa-(BETS)2FeBr4 査読

    T. Konoike, S. Uji, T. Terashima, M. Nishimura, S. Yasuzuka, K. Enomoto, H. Fujiwara, E. Fujiwara, B. Zhang, and H. Kobayashi

    Phys. Rev. B 雑誌 American Physical Society   B72   2005年09月

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  • Nuclear spin-lattice relaxation in kappa-(BETS)2FeBr4 査読

    S. Fujiyama, M. Takigawa, J. Kikuchi, K. Kodama, T. Nakamura, E. Fujiwara, H. Fujiwara, H.-B. Cui, H. Kobayashi

    Synth. Met. 雑誌 Elsevier Science Ltd.   154   253 - 256   2005年09月

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  • Molecular Conductors Based on peri-Ditellurium Bridged Donors, 2,3-DMTTeA and TMTTeN 査読

    E. Fujiwara, H. Fujiwara, B. Zh. Narymbetov, H. Kobayashi, M. Nakata, H. Torii, A. Kobayashi, K. Takimiya, T. Otsubo, F. Ogura

    Eur. J. Inorg. Chem. 雑誌 Wiley-VCH   3435 - 3449   2005年09月

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  • TTF [FeIII(C2O4)Cl2]: An Organic-Inorganic Hybrid Exhibiting Canted Antiferromagnetism 査読

    B. Zhang, Z.-M. Wang, H. Fujiwara, H. Kobayashi, M. Kurmoo, K. Inoue, T. Mori, S. Gao, Y. Zhang, D.-B. Zhu

    Adv. Mater 雑誌 Wiley-VCH   17   1988 - 1991   2005年08月

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  • Development of an Antiferromagnetic Organic Superconductor kappa-(BETS)2FeBr4 査読

    H. Fujiwara, H. Kobayashi

    Bull. Chem. Soc. Jpn. 雑誌 Chemical Society of Japan   78   1181 - 1196   2005年07月

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  • Development of an antiferromagnetic organic superconductor kappa-(BETS)(2)FeBr4 査読

    H Fujiwara, H Kobayashi

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   78 ( 7 )   1181 - 1196   2005年07月( ISSN:0009-2673

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    The first antiferromagnetic organic superconductor, kappa-(BETS)(2)FeBr4 [BETS = bis(ethylenedithio)tetraselenafulvalene], was developed in the search for novel magnetic molecular conductors. This salt shows successive antiferromagnetic and superconducting transitions at T-N = 2.5 K and T-c = 1.1 K, respectively, at ambient pressure. Specific heat measurements and anisotropic behavior of intraplanar conducting properties under applied magnetic fields prove the coexistence of the antiferromagnetic ordering and superconductivity below T-c. The combination of metamagnetism of the magnetic layer and superconductivity of the conduction layer, which makes this salt a dual-functional system, yields two characteristic magnetic field-induced superconducting states around 1.6 and 12.5 T in terms of the Jaccarino-Peter compensation effect. Systematic studies on both the chemical pressure effect by a halogen exchange in the alloy system kappa-(BETS)(2)FeBCl4-x and the physical pressure effect by an application of real pressures in kappa-(BETS)(2)FeBr4 were performed to discuss the pi-d interaction in the kappa-(BETS)(2)FeBr4 system.

    DOI: 10.1246/bcsj.78.1181

  • Magnetic properties of field-induced superconductor, kappa-(BETS)2FeBr4 査読

    T. Konoike, S. Uji, M. Nishimura, K. Enomoto, H. Fujiwara, B. Zhang, H. Kobayashi

    Physica B 雑誌 Elsevier Science Ltd.   359   457 - 459   2005年04月

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  • Ferromagnetic Ordering of Fe(III) d Spins of FeBr4- Ions in (Ethylenedithiotetrathiafulvalenothioquinone-ethylenedithio-1,3-dithiolemethide)FeBr4 査読

    M. -X. Wang, H. Fujiwara, T. Sugimoto, S. Noguchi, T. Ishida

    Inorg. Chem. 雑誌 American Chemical Society   44   1184 - 1186   2005年03月

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  • Synthesis and characterization of a porous magnetic diamond framework, Co3(HCOO)6, and its N-2 sorption characteristic 査読

    Z.-M. Wang, B. Zhang, M. Kurmoo, M. A. Green, H. Fujiwara, T. Otsuka, H. Kobayashi

    Inorg. Chem. 雑誌 American Chemical Society   44   1230 - 1237   2005年03月

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  • Synthesis and characterization of a porous magnetic diamond framework, Co3(HCOO)6, and its N2 sorption characteristic. 査読

    Wang Z, Zhang B, Kurmoo M, Green MA, Fujiwara H, Otsuka T, Kobayashi H

    Inorganic chemistry   44 ( 5 )   1230 - 1237   2005年03月( ISSN:0020-1669

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ic048986r

    PubMed

  • Ferromagnetic ordering of Fe(III) d spins of FeBr4- ions in (ethylenedithiotetrathiafulvalenothioquinone-ethylenedithio-1,3-dithiolemethide) x FeBr4. 査読

    Wang M, Fujiwara H, Sugimoto T, Noguchi S, Ishida T

    Inorganic chemistry   44 ( 5 )   1184 - 1186   2005年03月( ISSN:0020-1669

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ic0482988

    PubMed

  • Crystal structures and physical properties of single-component molecular conductors consisting of nickel and gold complexes with bis(trifluoromethyl)tetrathiafulvalenedithiolate ligands 査読

    M. Sasa, E. Fujiwara, A. Kobayashi, S. Ishibashi, K. Terakura, Y. Okano, H. Fujiwara, H. Kobayashi

    J. Mater. Chem. 雑誌 American Chemical Society   15   155 - 163   2005年01月

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  • Crystal structures and physical properties of single-component molecular conductors consisting of nickel and gold complexes with bis(trifluoromethyl)tetrathiafulvalenedithiolate ligands 査読

    M Sasa, E Fujiwara, A Kobayashi, S Ishibashi, K Terakura, Y Okano, H Fujiwara, H Kobayashi

    JOURNAL OF MATERIALS CHEMISTRY   15 ( 1 )   155 - 163   2005年( ISSN:0959-9428

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    掲載種別:研究論文(学術雑誌)  

    The neutral nickel and gold complexes with bis(trifluoromethyl)tetrathiafulvalenedithiolate ligands, [M(hfdt)(2)] (M = Ni, Au) were prepared in order to examine the possibility of the development of single-component molecular conductors soluble in organic solvents. However, in contrast to the previous report, the crystals did not show any solubility in the usual organic solvents. On the other hand, the crystal structure analyses showed unique two-dimensional layered structures, despite that the single-component molecular conductors usually tend to take a compact three-dimensional molecular arrangement. Each layer is separated by the terminal CF3 groups to form the "CF3 bilayer structure". The shortest intermolecular F...F distance (3.018 Angstrom for [Ni(hfdt)(2)] and 2.862 Angstrom for [Au(hfdt)(2)]) is significantly longer than the van der Waals F...F distance (2.70 Angstrom) and the distribution of the frontier electrons is almost zero around the CF3 bilayer region. This is due to the strong F. F segregation effect, which will provide a useful way to control the molecular aggregation in the single-component molecular conductors. Extended-Huckel tight-binding band structure calculations and the ab initio local density approximation (LDA) band structure calculations were made for [Ni(hfdt)(2)], which explains the semiconducting and non-magnetic properties of the system. Extended-Huckel tight-binding band structure calculations were also made for [Au(hfdt)(2)]. The calculated band structure is consistent with the semiconducting and almost non-magnetic properties of [Au(hfdt)(2)].

    DOI: 10.1039/b413597k

  • Metallic/semiconducting behaviors and an antiferromagnetic ordering of FeBr(4)(_)(-)d spins in (Benzo-TTFVS)(2)(MX4)-M-. (M = Fe, Ga; X = Cl, Br) 査読

    T Hiraoka, Y Kamada, T Matsumoto, H Fujiwara, T Sugimoto, S Noguchi, T Ishida, H Nakazumi, HA Katori

    JOURNAL OF MATERIALS CHEMISTRY   15 ( 34 )   3479 - 3487   2005年( ISSN:0959-9428

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    掲載種別:研究論文(学術雑誌)  

    The 2 : 1 salts of a new donor molecule, benzotetrathiafulvalenothioquinone-1,3-dithiolemethide (Benzo-TTFVS) with magnetic FeCl4- and FeBr4- ions, and with non-magnetic GaCl4- and GaBr4- ions were obtained as single crystals by an electrochemical oxidation method. All of the crystals have very similar structures to each other, in which two different layers of the donor molecules and the counteranions are stacked alternately, although the separation distance between the neighboring donor layers in the FeCl4- and GaCl4- salts is shorter by 0.43-0.47 angstrom than that in the FeBr4- and GaBr4- salts. The donor molecules formed a beta-like stacking structure with almost the same interplanar distances and effective overlaps along the stacking direction, such that these salts showed high electrical conductivities (9-33 S cm(-1)) at room temperature, as well as metallic behavior. However, owing to a quasi one-dimensional character of the calculated band structures, a transition of metal-to-semiconductor with a very small activation energy of &lt; 30 meV occurred at comparatively high temperatures of 100-150 K. The Fe(III) d spins of the FeCl4- ions were subject to weakly antiferromagnetic interaction (Weiss temperature, theta = -4.3 K). While, the interaction between the Fe(III) d spins of the FeBr4- ions was fairly strong (theta = -16.1 K), eventually giving rise to an antiferromagnetic ordering at the temperature of 5.8 K. In the magnetization measurement of the FeBr4- salt up to 320 kOe at 0.5 K, a spin-flop occurred near 20 kOe and a saturation near 156 kOe.

    DOI: 10.1039/b506725a

  • Magnetic-field-induced superconductivity in the antiferromagnetic organic superconductor 査読

    T. Konoike, S. Uji, T. Terashima, M. Nishimura, S. Yasuzuka, K. Enomoto, H. Fujiwara, B. Zhang, and H. Kobayashi

    Phys. Rev. B 雑誌 American Physical Society   B70   2004年10月

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  • Fermi surface in magnetic-field-induced superconductor kappa-(BETS)2FeBr4 査読

    T. Konoike, H. Fujiwara, B. Zhang, H. Kobayashi, M. Nishimura, S. Yasuzuka, K. Enomoto, S. Uji

    Physica C 雑誌 Elsevier Science Ltd.   412-414   107 - 110   2004年10月

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  • Strong evidence of field-induced superconductivity and Shubnikov-de Haas oscillation in kappa-(BETS)2FeBr4 査読

    T. Konoike, H. Fujiwara, B. Zhang, H. Kobayashi, M. Nishimura, S. Yasuzuka, K. Enomoto, S. Uji

    Journal de Physique IV 雑誌 EDP Sciences   114   223 - 226   2004年10月

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    共著区分:共著  

  • Synthesis, Structures and Physical Properties of a New Organic Conductor Based on a p-Extended Donor Containing a Stable PROXYL Radical 査読

    H. Fujiwara, H.-J. Lee, H.-B. Cui, H. Kobayashi, E. Fujiwara, A. Kobayashi

    Adv. Mater. 雑誌 Wiley-VCH   16   1765 - 1769   2004年10月

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  • Novel p-Extended Donors Containing a 2,2,5,5-Tetramethylpyrrolin-1-yloxyl Radical Designed for Magnetic Molecular Conductors 査読

    E. Fujiwara, A. Kobayashi, H. Fujiwara, T. Sugimoto, H. Kobayashi

    Chem. Lett. 雑誌 Chemical Society of Japan   33   964 - 965   2004年08月

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  • Novel pi-extended donors containing a 2,2,5,5-tetramethylpyrrolin-1-yloxyl radical designed for magnetic molecular conductors 査読

    E Fujiwara, A Kobayashi, H Fujiwara, T Sugimoto, H Kobayashi

    CHEMISTRY LETTERS   33 ( 8 )   964 - 965   2004年08月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    We synthesized pi-extended donors for magnetic conductors that contain a stable 2,2,5,5-tetramethylpyrrolin-1-yloxyl radical, and cleared their structure and physical properties. We also discussed the conducting and magnetic properties of cation radical salts of the synthesized donor.

    DOI: 10.1246/cl.2004.964

  • The pressure effect on the antiferromagnetic and superconducting transitions of kappa-(BETS)2FeBr4, T. Otsuka, H.-B. Cui, H. Fujiwara, H. Kobayashi, E. Fujiwara, A. Kobayashi 査読

    T. Otsuka, H.-B. Cui, H. Fujiwara, H. Kobayashi, E. Fujiwara, A. Kobayashi

    J. Mater. Chem. 雑誌 American Chemical Society   14   1682 - 1685   2004年05月

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  • Recent progress in development of single-component molecular metals 査読

    A. Kobayashi, E. Fujiwara, W. Suzuki, M. Sasa, Y. Fujishiro, E. Nishibori, M. Takata, M. Sakata, Y. Okano, H. Fujiwara, H. Kobayashi

    Journal de Physique IV 雑誌 EDP Sciences   114   419 - 424   2004年04月

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  • Development of new magnetic organic conductors based on donor molecules with stable organic radical part 査読

    H.-J. Lee, H.-B. Cui, H. Fujiwara, H. Kobayashi, E. Fujiwara, A. Kobayashi

    Journal de Physique IV 雑誌 EDP Sciences   114   533 - 535   2004年04月

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  • Syntheses, Structures, and Physical Properties of Nickel Bis(dithiolene) Complexes Containing Tetrathiafulvalene (TTF) Units 査読

    E. Fujiwara, A. Kobayashi, H. Fujiwara, H. Kobayashi

    Inorg. Chem. 雑誌 American Chemical Society   43   1122 - 1129   2004年02月

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  • Mn3(HCOO)6: a 3D porous magnet of diamond framework with nodes of Mn-centered MnMn4 tetrahedron and guest-modulated ordering temperature 査読

    Z.-M. Wang, B. Zhang, H. Fujiwara, H. Kobayashi, M. Kurmoo

    Chem. Commun. 雑誌 Royal Society of Chemistry   416 - 417   2004年02月

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    共著区分:共著  

  • Syntheses, structures, and physical properties of nickel bis(dithiolene) complexes containing tetrathiafulvalene (TTF) units. 査読

    Fujiwara E, Kobayashi A, Fujiwara H, Kobayashi H

    Inorganic chemistry   43 ( 3 )   1122 - 1129   2004年02月( ISSN:0020-1669

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ic034670s

    PubMed

  • Mn3(HCOO)6: a 3D porous magnet of diamond framework with nodes of Mn-centered MnMn4 tetrahedron and guest-modulated ordering temperature. 査読

    Wang Z, Zhang B, Fujiwara H, Kobayashi H, Kurmoo M

    Chemical communications (Cambridge, England)   ( 4 )   416 - 417   2004年02月( ISSN:1359-7345

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/b314221c

    PubMed

  • Infrared Electronic Absorption in a Single-Component Molecular Metal 査読

    A. Kobayashi, M. Sasa, W. Suzuki, E. Fujiwara, H. Tanaka, M. Tokumoto, Y. Okano, H. Fujiwara, H. Kobayashi

    J. Am. Chem. Soc 雑誌 American Chemical Society   126   426 - 427   2004年01月

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  • Infrared electronic absorption in a single-component molecular metal. 査読

    Kobayashi A, Sasa M, Suzuki W, Fujiwara E, Tanaka H, Tokumoto M, Okano Y, Fujiwara H, Kobayashi H

    Journal of the American Chemical Society   126 ( 2 )   426 - 427   2004年01月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ja0379767

    PubMed

  • The pressure effect on the antiferromagnetic and superconducting transitions of kappa-(BETS)(2)FeBr4 査読

    T Otsuka, HB Cui, H Fujiwara, H Kobayashi, E Fujiwara, A Kobayashi

    JOURNAL OF MATERIALS CHEMISTRY   14 ( 11 )   1682 - 1685   2004年( ISSN:0959-9428

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    掲載種別:研究論文(学術雑誌)  

    The temperature-pressure phase diagram of the first antiferromagnetic organic superconductor kappa-(BETS)(2)FeBr4 shows that the Neel temperature increases with pressure, while the superconducting transition temperature decreases rapidly around 3 kbar.

    DOI: 10.1039/b404004j

  • Development of single-component molecular metals and magnetic molecular superconductors 査読

    H Kobayashi, Y Okano, H Fujiwara, H Tanaka, M Tokumoto, W Suzuki, E Fujiwara, A Kobayashi

    ORGANIC CONDUCTORS, SUPERCONDUCTORS AND MAGNETS: FROM SYNTHESIS TO MOLECULAR ELECTRONICS   139   81 - +   2004年( ISSN:1568-2609

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    掲載種別:研究論文(国際会議プロシーディングス)  

  • BETS-based molecular conductors with tetrahedral anions TlCl4-, MnBr42-, CoCl42- (BETS = bis(ethylenedithio)tetraselenafulvalene) 査読

    V. V. Gritsenko, E. Fujiwara, H. Fujiwara, H. Tanaka, I. Tamura, H. Kobayashi, O. A. Dyachenko

    Russ. J. Coord. Chem. 雑誌 MAIK   29   773 - 779   2003年11月

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  • A Novel TTP Donor Containing a PROXYL Radical for         Magnetic Molecular Conductors 査読

    H. Fujiwara, H.-J. Lee, H. Kobayashi, E. Fujiwara, A. Kobayashi

    Chem. Lett. 雑誌 Chemical Society of Japan   32   482 - 483   2003年06月

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    共著区分:共著  

  • A novel TTP donor containing a PROXYL radical for magnetic molecular conductors 査読

    H Fujiwara, HJ Lee, H Kobayashi, E Fujiwara, A Kobayashi

    CHEMISTRY LETTERS   32 ( 6 )   482 - 483   2003年06月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    A TTP donor containing a stable PROXYL radical was synthesized to develop conducting-magnetic bifunctional materials and its structure and physical properties were investigated. Furthermore its cation radical salts were prepared and revealed their conducting and magnetic properties.

    DOI: 10.1246/cl.2003.482

  • Thermal conductivity of the antiferromagnetic organic superconductor kappa-(BETS)2FeBr4 in the low-field and field-induced superconducting states 査読

    M. A. Tanatar, M. Suzuki, T. Ishiguro, H. Fujiwara, H. Kobayashi

    Physica C 雑誌 Elsevier Science Ltd.   388   613 - 614   2003年05月

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    共著区分:共著  

  • Interplay of magnetism and superconductivity in BETS conductors (BETS= bis(ethylenedithio)tetraselenafulvalene 査読

    H. Kobayashi, B. Zhang, H. Tanaka, H. Fujiwara, T. Otsuka, E. Fujiwara and A. Kobayashi

    Synth. Met. 雑誌 Elsevier Science Ltd.   137   1157 - 1162   2003年04月

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    共著区分:共著  

  • Synthesis, structures and physical properties of donors containing a PROXYL radical 査読

    H. Fujiwara, E. Fujiwara, H. Kobayashi

    Synth. Met. 雑誌 Elsevier Science Ltd.   135-136   533 - 534   2003年04月

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    共著区分:共著  

  • Thermal conductivity of organic superconductors in oriented magnetic field 査読

    M. A. Tanatar, M. Suzuki, T. Ishiguro, H. Tanaka, H. Fujiwara, H. Kobayashi, T. Toito and J. Yamada

    Synth. Met. 雑誌 Elsevier Science Ltd.   137   1291 - 1293   2003年04月

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  • Synthesis, structures and properties of new organic donors connecting to a TEMPO radical through a pyrrolidine ring 査読

    H. Fujiwara, E. Fujiwara, H. Kobayashi

    Synth. Met. 雑誌 Elsevier Science Ltd.   133-134   359 - 360   2003年03月

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  • Electronic properties of BETS superconductors with magnetic anions (BETS = bis(ethylenedithio)tetraselenafulvalene) 査読

    H. Kobayashi, H. Tanaka, H. Fujiwara, I. Tamura, V. Gritsenko, T. Otsuka, E. Fujiwara, A. Kobayashi, M. Tokumoto, P. Cassoux

    Synth. Met. 雑誌 Elsevier Science Ltd.   133   477 - 479   2003年03月

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  • Electronic properties of BETS superconductors with magnetic anions (BETS = bis(ethylenedithio)tetraselenafulvalene) 査読

    H Kobayashi, H Tanaka, H Fujiwara, Tamura, I, Gritsenko, V, T Otsuka, E Fujiwara, A Kobayashi, M Tokumoto, P Cassoux

    SYNTHETIC METALS   133   477 - 479   2003年03月( ISSN:0379-6779

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    掲載種別:研究論文(学術雑誌)  

    The physical properties of BETS (=bis(ethylenedithio)tetraselenafulvalene) conductors with tetrahalide magnetic anions and related systems were investigated. We have recently succeeded to find the superconducting transition of the crystal of kappa-type TICl4- salt coated with epoxy resin (T-c(onset) = 2.5 K). The specific heat measurements on the antiferromagnetic organic superconductor, kappa-(BETS)(2)FeCl4 was performed down to 60 mK, which gave sharp peak at 0.45 K (T-N). The peak trails a tail at T &gt; T-N, suggesting low-dimensionality of the spin system. Resistivity measurements under magnetic field of lambda-(BETS)(2)FeGa1-xCl4 (x approximate to 0.4) exhibiting superconductor-to-insulating (SC-I) transition, I-SC phase transition was observed around 4 T at T &lt; 3 K. The "low-field superconducting region" between metallic and insulating phases around zero magnetic field is connected with the "high-field superconducting region". (C) 2002 Elsevier Science B.V. All rights reserved.

  • Highly Conducting Crystals Based on Single-Component Gold Complexes with Extended-TTF Dithiolate Ligands 査読

    W. Suzuki, E. Fujiwara, A. Kobayashi, Y. Fujishiro, E. Nishibori, M. Takata, M. Sakata, H. Fujiwara, H. Kobayashi

    J. Am. Chem. Soc. 雑誌 American Chemical Society   125   1486 - 1487   2003年02月

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  • Highly conducting crystals based on single-component gold complexes with extended-TTF dithiolate ligands. 査読

    Suzuki W, Fujiwara E, Kobayashi A, Fujishiro Y, Nishibori E, Takata M, Sakata M, Fujiwara H, Kobayashi H

    Journal of the American Chemical Society   125 ( 6 )   1486 - 1487   2003年02月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ja0292243

    PubMed

  • Synthesis, Structures and Physical Properties of the Cation Radical Salts Based on TEMPO Radical Containing Electron Donors 査読

    H. Fujiwara, E. Fujiwara and H. Kobayashi

    Mol. Cryst. Liq. Cryst. 雑誌 Taylor   380   269 - 275   2002年12月

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  • New Organic Conductors Based on Tellurium-containing Donor Molecules 査読

    E. Ojima, H. Fujiwara, H. Kobayashi, M. Tokumoto and A. Kobayashi

    Mol. Cryst. Liq. Cryst. 雑誌 Taylor   380   175 - 181   2002年12月

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  • Antiferromagnetic Organic Superconductors, k-(BETS)2FeX4 (X = Br, Cl) 査読

    H. Kobayashi, E. Ojima, H. Fujiwara, H. Tanaka, T. Otsuka, A. Kobayashi, M. Tokumoto and P. Cassoux

    Mol. Cryst. Liq. Cryst. 雑誌 Taylor   380   139 - 144   2002年12月

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  • Magnetic Organic Superconductors Based on BETS Molecules_Interplay of Conductivity and Magnetism 査読

    H. Kobayashi, E. Fujiwara, H. Fujiwara, H. Tanaka, I. Tamura, B. Zhang, V. Gritsenko, T. Otsuka, A. Kobayashi, M. Tokumoto, P. Cassoux

    Mol. Cryst. Liq. Cryst. 雑誌 Taylor   379   2002年11月

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  • Novel p-Electron Donors for Magnetic Conductors Containing a PROXYL Radical 査読

    H. Fujiwara, E. Fujiwara, H. Kobayashi

    Chem. Lett. 雑誌 Chemical Society of Japan   1048 - 1049   2002年10月

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  • A Series of Organic Conductors k-(BETS)2FeBrxCl4-x (0 _ x _ 4) Exhibiting Successive Anti-ferromagnetic and Superconducting Transitions 査読

    E. Fujiwara, H. Fujiwara, H. Kobayashi, T. Otsuka, A. Kobayashi

    Adv. Mater. 雑誌 Wiley-VCH   14   1376 - 1379   2002年10月

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  • A series of organic conductors, kappa-(BETS)(2)FeBrxCl4-x, (0 &lt;= x &lt;= 4), exhibiting successive antiferromagnetic and superconducting transitions 査読

    E Fujiwara, H Fujiwara, H Kobayashi, T Otsuka, A Kobayashi

    ADVANCED MATERIALS   14 ( 19 )   1376 - 1379   2002年10月( ISSN:0935-9648

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    掲載種別:研究論文(学術雑誌)  

  • Novel pi-electron donors for magnetic conductors containing a PROXYL radical 査読

    H Fujiwara, E Fujiwara, H Kobayashi

    CHEMISTRY LETTERS   ( 10 )   1048 - 1049   2002年10月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    Synthesis, structure and physical properties of novel pi-electron donors containing a TTF moiety and a PROXYL radical within a single molecule designed for the development of magnetic conductors are reported. We also clarified the physical proper-ties of the iodine complex of the ethylenedithio derivative.

    DOI: 10.1246/cl.2002.1048

  • Dual-action molecular superconductors with magnetic anions.

    Zhang B, Tanaka H, Fujiwara H, Kobayashi H, Fujiwara E, Kobayashi A

    Journal of the American Chemical Society   124 ( 34 )   9982 - 3   2002年08月( ISSN:0002-7863

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  • Dual-Action Molecular Superconductors with Magnetic Anions 査読

    B. Zhang, H. Tanaka, H. Fujiwara, H. Kobayashi, E. Fujiwara, A. Kobayashi

    J. Am. Chem. Soc. 雑誌 American Chemical Society   124   9982 - 9983   2002年08月

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  • Dual-action molecular superconductors with magnetic anions 査読

    B Zhang, H Tanaka, H Fujiwara, H Kobayashi, E Fujiwara, A Kobayashi

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   124 ( 34 )   9982 - 9983   2002年08月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ja02911l

  • Development and physical properties of magnetic organic superconductors based on BETS molecules [BETS = bis(ethylenedithio)tetraselenafulvalene] 査読

    H. Kobayashi, E. Fujiwara, H. Fujiwara, H. Tanaka, H. Akutsu, I. Tamura, T. Otsuka, A. Kobayashi, M. Tokumoto, P. Cassoux

    J. Phys. Chem. Solids 雑誌 Elsevier Science Ltd.   63   1235 - 1238   2002年06月

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  • Magnetic molecular conductors based on BETS molecules and divalent magnetic anions [BETS = bis(ethylenedithio)tetraselenafulvalene 査読

    E. Fujiwara, V. Gritsenko, H. Fujiwara, I. Tamura, H. Kobayashi, M. Tokumoto, A. Kobayashi

    Inorg. Chem. 雑誌 American Chemical Society   41   3230 - 3238   2002年06月

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  • An indication of magnetic-field-induced superconductivity in a bifunctional layered organic conductor, k-(BETS)2FeBr4 査読

    H. Fujiwara, H. Kobayashi, E. Fujiwara, A. Kobayashi

    J. Am. Chem. Soc. 雑誌 American Chemical Society   124   6816 - 6817   2002年06月

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  • An indication of magnetic-field-induced superconductivity in a bifunctional layered organic conductor, kappa-(BETS)(2)FeBr(4). 査読

    Fujiwara H, Kobayashi H, Fujiwara E, Kobayashi A

    Journal of the American Chemical Society   124 ( 24 )   6816 - 6817   2002年06月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ja026067z

    PubMed

  • Magnetic molecular conductors based on BETS molecules and divalent magnetic anions [BETS = bis(ethylenedithio)tetraselenafulvalene]. 査読

    Fujiwara E, Gritsenko V, Fujiwara H, Tamura I, Kobayashi H, Tokumoto M, Kobayashi A

    Inorganic chemistry   41 ( 12 )   3230 - 3238   2002年06月( ISSN:0020-1669

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/ic011160u

    PubMed

  • Stable molecular metals based on bis(ethylenedithio)tetraselenafulvalene and halogen ions: k-(BETS)2X・C2H4(OH)2 (X=Br, Cl) 査読

    V. Gritsenko, E. Fujiwara, H. Fujiwara, H. Kobayashi

    Synth. Met. 雑誌 Elsevier Science Ltd.   128   273 - 278   2002年04月

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  • Organic antiferromagnetic metals exhibiting superconducting transitions k-(BETS)2FeX4 (X=Cl, Br): drastic effect of halogen substitution on the successive phase transitions 査読

    T. Otsuka, A. Kobayashi, Y. Miyamoto, J. Kiuchi, S. Nakamura, N. Wada, E. Fujiwara, H. Fujiwara and H. Kobayashi

    J. Solid State Chem. 雑誌 Academic Press   159   407 - 412   2001年07月

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  • Coexistence of antiferromagnetic order and superconductivity in organic conductors 査読

    H. Kobayashi, H. Tanaka, E. Ojima, H. Fujiwara, T. Otsuka, A. Kobayashi, M. Tokumoto. P. Cassoux

    Polyhedron 雑誌 Elsevier Science Ltd.   20   1587 - 1592   2001年05月

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  • Two-dimensional Fermi surface for the organic conductor k-(BETS)2FeBr4 査読

    S. Uji, H. Shinagawa, Y. Terai, T. Yakabe, C. Terakura, T. Terashima, L. Balicas, J. S. Brooks, E. Ojima, H. Fujiwara, H. Kobayashi, A. Kobayashi, M. Tokumoto

    Physica B 雑誌 Elsevier Science Ltd.   298   557 - 561   2001年04月

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  • Two-dimensional Fermi surface for the organic conductor kappa-(BETS)(2)FeBr4 査読

    S Uji, H Shinagawa, Y Terai, T Yakabe, C Terakura, T Terashima, L Balicas, JS Brooks, E Ojima, H Fujiwara, H Kobayashi, A Kobayashi, M Tokumoto

    PHYSICA B   298 ( 1-4 )   557 - 561   2001年04月( ISSN:0921-4526

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    掲載種別:研究論文(学術雑誌)  

    Magnetoresistance measurements have been performed for the organic conductor kappa-(BETS)(2) FeBr4 to investigate the Fermi surface. Three fundamental Shubnikov-de Haas oscillations (alpha, beta and gamma) were observed. The cross-sectional areas corresponding to the cc and P oscillations are about 20% and 100% in the first Brillouin zone, respectively. The oscillations can be assigned to the closed orbit and the magnetic breakdown orbit. The effective masses of the conduction electrons are determined to be 5.2m(0), for alpha and 7.9m(0) for beta. The heavy masses are probably due to the antiferromagnetic fluctuation effect of the Fe spins. The origin of the oscillation gamma with very low frequency is not explained by the band calculation. (C) 2001 Elsevier Science B.V. All rights reserved.

  • Synthesis and properties of a new TSeF derivative containing a pyrazino-ring 査読

    E. Ojima, H. Fujiwara, H. Kobayashi and M. Tokumoto

    Synth. Met. 雑誌 Elsevier Science Ltd.   120   887 - 888   2001年03月

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  • Antiferromagnetism and Superconductivity of BETS Conductors with Fe3+ Ions 査読

    H. Kobayashi, H. Tanaka, E. Ojima, H. Fujiwara, Y. Nakazawa, T. Otsuka, A. Kobayashi and P. Cassoux

    Synth. Met. 雑誌 Elsevier Science Ltd.   120   663 - 666   2001年03月

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  • Synthesis and properties of a new organic donor containing a TEMPO radical 査読

    H. Fujiwara, E. Ojima and H. Kobayashi

    Synth. Met. 雑誌 Elsevier Science Ltd.   120   971 - 972   2001年03月

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  • A novel antiferromagnetic organic superconductor k-(BETS)2FeBr4 [where BETS = bis(ethylenedithio)tetraselenafulvalene] 査読

    H. Fujiwara, E. Fujiwara, Y. Nakazawa, B. Z. Narymbetov, K. Kato, H. Kobayashi, A. Kobayashi, M. Tokumoto and P. Cassoux

    J. Am. Chem. Soc. 雑誌 American Chemical Society   123   306 - 314   2001年01月

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  • A novel antiferromagnetic organic superconductor kappa-(BETS)(2)FeBr4 [where BETS = bis(ethylenedithio)tetraselenafulvalene] 査読

    H Fujiwara, E Fujiwara, Y Nakazawa, BZ Narymbetov, K Kato, H Kobayashi, A Kobayashi, M Tokumoto, P Cassoux

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   123 ( 2 )   306 - 314   2001年01月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

    The electrical and magnetic properties of kappa-(BETS)(2)FeBr4 salt [where BETS = bis(ethylenedithio)tetraselenafulvalene] showed that this system is the first antiferromagnetic organic metal at ambient pressure (T-N = 2.5 K). The characteristic field dependence of the magnetization at 2.0 K indicates a clear metamagnetic behavior. The small resistivity drop observed at T-N clearly shows the existence of the interaction between pi metal electrons and localized magnetic moments of Fe3+ ions. In addition, this system underwent a superconducting transition at 1.1 K. That is, kappa-(BETS)(2)FeBr4 is the first antiferromagnetic organic metal exhibiting a superconducting transition below Neel temperature. The magnetic field dependence of the superconducting critical temperature indicated that the superconductivity in this system is strongly anisotropic also in the conduction plane because of the existence of the metamagnetically induced internal field based on the antiferromagnetic ordering of the Fe3+ 3d spins in contrast to the cases of the other conventional organic superconductors. Furthermore, the specific heat measurement exhibited a lambda -type large peak of zero-field specific heat corresponding to the three-dimensional antiferromagnetic ordering of high-spin Fe3+ ions. The lack of distinct anomaly in the C-p vs T curve at T-c suggests the coexistence of the superconductivity and the antiferromagnetic order below T-c.

  • Shubnikov-de Haas effect and Yamaji oscillations in the antiferromagnetically ordered organic superconductor k-(BETS)2FeBr4: a fermiology study 査読

    L. Balicas, J. S. Brooks, K. Storr, D. Graf, S. Uji, H. Shinagawa, E. Ojima, H. Fujiwara, H. Kobayashi, A. Kobayashi and M. Tokumoto

    Solid State Commun. 雑誌 Elsevier Science Ltd.   116   557 - 562   2000年11月

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  • Successive antiferromagnetic and superconducting transitions in an organic metal, k-(BETS)2FeCl4 査読

    T. Otsuka, A. Kobayashi, Y. Miyamoto, J. Kiuchi, N. Wada, E. Ojima, H. Fujiwara and H. Kobayashi

    Chem. Lett. 雑誌 Chemical Society of Japan   732 - 733   2000年07月

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  • Preparation, structures and physical properties of selenium analogues of DTEDT as promising donors for organic metals 査読

    H. Fujiwara, Y. Misaki, T. Yamabe, T. Mori, H. Mori and S. Tanaka

    J. Mater. Chem. 雑誌 American Chemical Society   10   1565 - 1571   2000年07月

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  • Successive antiferromagnetic and superconducting transitions in an organic metal, kappa-(BETS)(2)FeCl4 査読

    T Otsuka, A Kobayashi, Y Miyamoto, J Kiuchi, N Wada, E Ojima, H Fujiwara, H Kobayashi

    CHEMISTRY LETTERS   ( 7 )   732 - 733   2000年07月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    The ac magnetic measurements on an organic metal, kappa- (BETS)(2)FeCl4 down to 60 mK revealed successive antiferromagnetic and superconducting phase transitions at about 0.65 K (approximate to T-N) and 0.1 K (approximate to T-C), respectively. These transitions correspond to the similar transitions in the Br-analogue, kappa-(BETS)(2)FeBr4 but the transition temperatures of FeCl4 system are significantly lower than those of FeBr4 system (T-N = 2.5 K; T-C = 1.1 K).

  • A new k-type organic superconductor based on BETS molecules, k-(BETS)2GaBr4 [BETS = bis(ethylenedithio)tetraselenafulvalene] 査読

    H. Tanaka, E. Ojima, H. Fujiwara, Y. Nakazawa, H. Kobayashi and A. Kobayashi

    J. Mater. Chem. 雑誌 American Chemical Society   10   245 - 247   2000年02月

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  • A new kappa-type organic superconductor based on BETS molecules, kappa-(BETS)(2)GaBr4 [BETS = bis(ethylenedithio)tetraselenafulvalene] 査読

    H Tanaka, E Ojima, H Fujiwara, Y Nakazawa, H Kobayashi, A Kobayashi

    JOURNAL OF MATERIALS CHEMISTRY   10 ( 2 )   245 - 247   2000年02月( ISSN:0959-9428

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    掲載種別:研究論文(学術雑誌)  

    Similar to the recently discovered organic conductor kappa-(BETS)(2)FeBr4 exhibiting a transition from an antiferromagnetic metal phase to a superconducting phase at 1.0K, kappa-(BETS)(2)GaBr4 shows a super-conducting transition around 0.5-1.0K, indicating T-C of kappa-(BETS)(2)MBr4 (M = Fe, Ga) to be almost independent of the existence of magnetic anions; from these findings a way to develop novel organic conductors with controlled antiferromagnetic interactions is suggested.

    DOI: 10.1039/a908789c

  • Shubnikov-de Haas effect and Yamaji oscillations in the antiferromagnetically ordered organic superconductor kappa-(BETS)(2)FeBr4: a fermiology study 査読

    L Balicas, JS Brooks, K Storr, D Graf, S Uji, H Shinagawa, E Ojima, H Fujiwara, H Kobayashi, A Kobayashi, M Tokumoto

    SOLID STATE COMMUNICATIONS   116 ( 10 )   557 - 562   2000年( ISSN:0038-1098

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    掲載種別:研究論文(学術雑誌)  

    Shubnikov-de Haas (SdH) effect and angular dependent magnetoresistance oscillations (AMRO) were observed in the organic superconductor: kappa-(BETS)(2)FeBr4. In contrast to its isostructural compound kappa-(BETS)(2)FeCl4, SdH oscillations, for fields perpendicular to the conducting planes, reveal three Fermi Surface (FS) closed orbits alpha, beta, and gamma whose cross-sectional areas are 19.8, 99.9, and 2.4% of the first Brillouin zone, respectively. The conduction electron effective masses were found to be: mu (alpha) = (4.7 +/- 0.2)m(e), mu (beta) = (8.0 +/- 1.0)m(e), and mu (gamma) = (2.0 +/- 0.2)m(e). The observation of a gamma orbit is not expected from band structure calculations, mu (beta) is among the heaviest masses ever reported for an organic conductor. The observed Yamaji-like AMRO indicates a 2D closed FS, warped along the k(z) direction. (C) 2000 Elsevier Science Ltd. All rights reserved.

  • Preparation, structures and physical properties of selenium analogues of DTEDT as promising donors for organic metals 査読

    H Fujiwara, Y Misaki, T Yamabe, T Mori, H Mori, S Tanaka

    JOURNAL OF MATERIALS CHEMISTRY   10 ( 7 )   1565 - 1571   2000年( ISSN:0959-9428

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    掲載種別:研究論文(学術雑誌)  

    Three selenium analogues of DTEDT [2-(1,3-dithiol-2-ylidene)-5-[2-(1,3-dithiol-2-ylidene)ethylidene]-1,3,4,6-tetrathiapentalene] have been synthesized. They showed four pairs of single-electron redox waves. The E-1 values are a little higher by 0.02-0.05 V than that of DTEDT. On the other hand, the E-2-E-1 values are almost equal to that of DTEDT. Their TCNQ complex and cation radical salts show fairly high electrical conductivities and several salts exhibit metallic conductivities. In particular the ReO4- and Au(CN)(2)(-) salts of DTEDS and the SbF6-, TaF6- and I-3(-) salts of DSEDS exhibited stable metallic behaviour down to 1.5-4.2 K. An X-ray crystal structure analysis of the metallic salt (DSEDS)(3)TaF6 reveals that this salt has a two-dimensional beta-type packing motif of the donor molecules similar to the superconducting (DTEDT)(3)Au(CN)(2). The calculated Fermi surface of (DSEDS)(3)TaF6 is a two-dimensional closed ellipsoid.

    DOI: 10.1039/b002790l

  • New p-extended organic donor containing a stable TEMPO radical as a candidate for conducting magnetic multifunctional materials 査読

    H. Fujiwara, and H. Kobayashi

    Chem. Commun. 雑誌 Royal Society of Chemistry   2417 - 2418   1999年12月

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  • Synthesis, structures, and properties of new organic conductors based on tellurocycle-fused TTF donor molecules 査読

    E. Ojima, H. Fujiwara, H. Kobayashi and A. Kobayashi

    Adv. Mater. 雑誌 Wiley-VCH   11   1527 - 1530   1999年12月

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  • Pressure-induced superconducting transition of l- (BETS)2FeCl4 with p-d coupled antiferromagnetic insulating ground state at ambient pressure [BETS = bis(ethylenedithio)tetraselenafulvalene] 査読

    H. Tanaka, T. Adachi, E. Ojima, H. Fujiwara, K. Kato, H. Kobayashi, A. Kobayashi and P. Cassoux

    J. Am. Chem. Soc. 雑誌 American Chemical Society   121   11243 - 11244   1999年12月

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  • Pressure-induced superconducting transition of lambda-(BETS)(2)FeCl4 with pi-d coupled antiferromagnetic insulating ground state at ambient pressure [BETS = bis(ethylenedithio)tetraselenafulvalene] 査読

    H Tanaka, T Adachi, E Ojima, H Fujiwara, K Kato, H Kobayashi, A Kobayashi, P Cassoux

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   121 ( 48 )   11243 - 11244   1999年12月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

  • Novel oxygen-containing p-electron donors for organic metals: 2-(1,3-dithiol-2-ylidene)-5-(pyran-4-ylidene)-1,3,4,6-tetrathiapentalenes 査読

    Y. Misaki, H. Fujiwara, T. Maruyama, M. Taniguchi, T. Yamabe, M. Takehiko, M. Mori and S. Tanaka

    Chem. Mater. 雑誌 American Chemical Society   11   2360 - 2368   1999年09月

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  • Novel oxygen-containing pi-electron donors for organic metals: 2-(1,3-dithiol-2-ylidene)-5-(pyran-4-ylidene)-1,3,4,6-tetrathiapentalenes 査読

    Y Misaki, H Fujiwara, T Maruyama, M Taniguchi, T Yamabe, M Takehiko, M Mori, S Tanaka

    CHEMISTRY OF MATERIALS   11 ( 9 )   2360 - 2368   1999年09月( ISSN:0897-4756

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    掲載種別:研究論文(学術雑誌)  

    A bis-fused pi-electron donor incorporating a pyran-4-ylidene moiety, 2-(1,3-dithiol-2-ylidene)-5-(pyran-4-ylidene)-1,3,4,6-tetrathiapentalene (PDT-TTP, 1a), and its derivatives (1b-d) have been synthesized. The cyclic voltammograms of PDT-TTPs are composed of three pairs of redox waves. Comparison of the first oxidation potentials (E-1) suggests PDT-TTP (+0.42 V vs SCE in benzonitrile) is a weaker donor than TTF (+0.35 V). The present donors have produced a large number of highly conducting (sigma(rt) = 10(0)- 10(2) S cm(-1)) molecular complexes. Among them, conducting salts based on the ET-PDT (1d) are metallic down to liquid helium temperature, The metallic PF6- salt of ET-PDT has a composition of(ET-PDT)(4)PF6(cn), where cn is 1-chloronaphthalene, in which two crystallographically independent ET-PDT molecules A and B form a face-to-face stack with a four-folded period as A'ABB'. In the present salt, the head-to-tail overlap of the unsymmetrical pi-electron framework of PDT-TTP prevents an effective intrastack overlap and produces a strongly dimerized electronic structure along the stack direction. Tight-binding band calculations indicate that it has opened Fermi surfaces characteristic of quasi-one-dimensional metals.

    DOI: 10.1021/cm981035p

  • New stable metallic salt based on a donor molecule containing peri-ditellurium bridges, TMTTeN(SCN)0.88 査読

    E. Ojima, B. Z. Narymbetov, H. Fujiwara, H. Kobayashi, A. Kobayashi, K. Takimiya, T. Otsubo and F. Ogura

    Chem. Lett. 雑誌 Chemical Society of Japan   845 - 846   1999年08月

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    共著区分:共著  

  • New stable metallic salt based on a donor molecule containing peri-ditellurium bridges, TMTTeN(SCN)(0.88) 査読

    E Ojima, BZ Narymbetov, H Fujiwara, H Kobayashi, A Kobayashi, K Takimiya, T Otsubo, F Ogura

    CHEMISTRY LETTERS   ( 8 )   845 - 846   1999年08月( ISSN:0366-7022

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    A new stable organic metal, TMTTeN(SCN)(0.88), where TMTTeN is 2,3,6,7-tetramethylnaphtho[1,8-cd:4,5-c'd']bis[1,2] ditellurole, was obtained. The donors are stacked to form columns and three-dimensional network is developed through Te ... Te contacts. The salt is highly conductive and keeps metallic behavior down to 4.2 K. Furthermore the salt exhibits Pauli paramagnetic behavior down to 2 K. The extended Huckel tight-binding band calculation was examined.

    DOI: 10.1246/cl.1999.845

  • Synthesis, structure, and physical properties of 4,5-ethylenedithio-4,5-pentathiotetrathiafulvalene and its perchlorate salt 査読

    E. Ojima, H. Fujiwara and H. Kobayashi

    Adv. Mater. 雑誌 Wiley-VCH   11   758 - 761   1999年07月

     詳細を見る

    共著区分:共著  

  • Antiferromagnetic organic metal exhibiting superconducting transition, k-(BETS)2FeBr4 [BETS = bis(ethylenedithio)tetraselenafulvalene] 査読

    E. Ojima, H. Fujiwara, K. Kato, H. Kobayashi, H. Tanaka, A. Kobayashi, M. Tokumoto and P. Cassoux

    J. Am. Chem. Soc. 雑誌 American Chemical Society   121   5581 - 5582   1999年06月

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    共著区分:共著  

  • Antiferromagnetic organic metal exhibiting superconducting transition, kappa-(BETS)(2)FeBr4 [BETS = bis(ethylenedithio)tetraselenafulvalene] 査読

    E Ojima, H Fujiwara, K Kato, H Kobayashi, H Tanaka, A Kobayashi, M Tokumoto, P Cassoux

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   121 ( 23 )   5581 - 5582   1999年06月( ISSN:0002-7863

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    掲載種別:研究論文(学術雑誌)  

  • Synthesis, structure and properties of an unsymmetrical tetraselenafulvalene donor fused with a pyrazino-ring (PEDTTSeF), and its cation radical salts. 査読

    E. Ojima, H. Fujiwara and H. Kobayashi

    Adv. Mater. 雑誌 Wiley-VCH   11   459 - 462   1999年04月

     詳細を見る

    共著区分:共著  

  • New pi-extended organic donor containing a stable TEMPO radical as a candidate for conducting magnetic multifunctional materials 査読

    H Fujiwara, H Kobayashi

    CHEMICAL COMMUNICATIONS   ( 23 )   2417 - 2418   1999年( ISSN:1359-7345

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    A novel organic electron donor containing a stable TEMPO radical (TEMPOET) was synthesized and its magnetic and electrochemical properties were investigated; furthermore, the crystal structure and physical properties of the Au(CN)(2)(-) salt of TEMPOET were clarified.

    DOI: 10.1039/a907363i

  • Preparation, structures and physical properties of kappa-type two-dimensional conductors based on unsymmetrical extended tetrathiafulvalene: 2-cyclopentanylidene-1,3-dithiolo[4,5-d]-4,5-ethylenedithiotetrathiafulvalene (CPDTET) 査読

    H Fujiwara, Y Misaki, M Taniguchi, T Yamabe, T Kawamoto, T Mori, H Mori, S Tanaka

    JOURNAL OF MATERIALS CHEMISTRY   8 ( 8 )   1711 - 1717   1998年08月( ISSN:0959-9428

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    Several cation radical salts of an unsymmetrical donor, 2-cyclopentanylidene-1,3-dithiolo [4,5-d]-4',5'-ethylenedithiotetrathiafulvalene (CPDTET) have been prepared. Most salts with octahedral (AsF6-, SbF6-, NbF6- and TaF6-) and linear (I-3(-)) anions showed high conductivity (sigma(rt) = 10(0)-10(2) S cm(-1)) and metallic conductive behaviour around room temperature. Among them, the AsF6- salt displayed metallic temperature dependence down to 4.2 K, while the SbF6- and TaF6- salts exhibited metal-to-semiconductor transitions at 200 and 140 K, respectively. The AsF6- and SbF6- salts have a kappa-type donor arrangement in which two donor molecules are strongly dimerized in a 'head-to-head' manner. The calculated Fermi surfaces of these salts are two-dimensional folded circles. Measurement of the thermoelectric power suggests that the AsF6- salt is a normal metal, however, the SbF6- salt has an almost half-filled band structure at room temperature and a small energy gap opens at low temperature. The measurements of magnetic susceptibility indicate that these two salts exhibited Pauli-paramagnetic temperature independence characteristic of metallic materials, though they also showed weak antiferromagnetic interaction. The differences between AsF6- and SbF6- salts are also discussed and the origin of the metal-to-semiconductor transition is clarified.

    DOI: 10.1039/a801375f

  • Novel stable metallic salts based on a donor molecule containing peri-ditellurium bridges, TMTTeN 査読

    E Arai, H Fujiwara, H Kobayashi, A Kobayashi, K Takimiya, T Otsubo, F Ogura

    INORGANIC CHEMISTRY   37 ( 12 )   2850 - 2851   1998年06月( ISSN:0020-1669

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    掲載種別:研究論文(学術雑誌)  

    The first stable organic metals of the peri-ditellurium-bridged polyacene donor TMTTeN were obtained as TMTTeN2M(CN)(2) (M = Ag, Au). Crystal structure analyses revealed three-dimensional networks through intermolecular Te ... Te contacts. The salts are highly conductive (500-1000 S cm(-1)) and keep the metallic states down to low temperature. The extended Huckel tight-binding band calculation gave the quasi-three-dimensional Fermi surfaces.

    DOI: 10.1021/ic9802247

  • Synthesis, structure and properties of a novel trisulfide double-bridged TTF dimer 査読

    H Fujiwara, E Arai, H Kobayashi

    JOURNAL OF MATERIALS CHEMISTRY   8 ( 4 )   829 - 831   1998年04月( ISSN:0959-9428

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    We have synthesized novel trisulfide-bridged tetrathiafulvalene (TTF) dimer molecule in which two TTF moieties are connected to each other by two trisulfide chains. X-Ray crystal structure analysis reveals that the molecule has a unique cyclophane-like U-shape structure. The structure of the ClO4, salt is also described.

    DOI: 10.1039/a800202i

  • Synthesis, structure and physical properties of the new selenium containing metal complex NBu4[Ni(ddds)(2)] (ddds=5,6-dihydro-1,4-dithiin-2,3-diselenolate) 査読

    H Fujiwara, E Arai, H Kobayashi

    CHEMICAL COMMUNICATIONS   ( 9 )   837 - 838   1997年05月( ISSN:1359-7345

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    The synthesis, structure and physical properties of the new selenium containing metal complex NBu4[Ni(ddds)(2)] (ddds = 5,6-dihydro-1,4-dithiin-2,3-diselenolate) are described.

    DOI: 10.1039/a701113j

  • Novel Bis-Fused pi-Electron Donors for Organic Metals: 2-(1,3-Dithiol-2-ylidene)-5-(thiopyran-4-ylidene)-1,3,4,6-tetrathiapentalene. 査読

    Misaki Y, Fujiwara H, Yamabe T

    The Journal of organic chemistry   61 ( 11 )   3650 - 3656   1996年05月( ISSN:0022-3263

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/jo9516244

    PubMed

  • Synthesis and properties of the selenium analogue of DTEDT 査読

    Y Misaki, H Fujiwara, T Yamabe, T Mori, H Mori, S Tanaka

    CHEMICAL COMMUNICATIONS   ( 3 )   363 - 364   1996年02月( ISSN:1359-7345

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    掲載種別:研究論文(学術雑誌)  

    Synthesis and electrochemical properties of the title donor are described; it gives a metallic TCNQ complex and radical-ation salts.

    DOI: 10.1039/cc9960000363

  • A VINYLOGUE OF BIS-FUSED TETRATHIAFULVALENE - NOVEL PI-ELECTRON FRAMEWORK FOR 2-DIMENSIONAL ORGANIC METALS 査読

    Y MISAKI, T OHTA, N HIGUCHI, H FUJIWARA, T YAMABE, T MORI, H MORI, S TANAKA

    JOURNAL OF MATERIALS CHEMISTRY   5 ( 10 )   1571 - 1579   1995年10月( ISSN:0959-9428

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    掲載種別:研究論文(学術雑誌)  

    Several derivatives of 2-(1,3-dithiol-2-ylidene)-5-(2-ethanediylide,3-dithiole)-1,3,4,6-tetrathiapentalene (1Aa, DTEDT), which is a vinylogue of bis-fused TTF (BDT-TTP) containing one 2,2'-ethanediylidenebis(1,3-dithiole) (2), have been synthesized. The cyclic voltammograms of the DTEDTs consist of four pairs of single-electron redox waves. Comparison of the first oxidation potentials (E(1)) reveals that donating ability of 1Aa is rather weaker than those of 2 and TTF, in spite of the extension of the apparent pi-conjugation. Substituent effects on the E(1) values suggest that the first one-electron oxidation occurs mainly in the vinylogous TTF moiety. The smaller E(2)-E(1) value of 1Aa compared with those of BDT-TTP, TTF and 2 suggests a decrease in the on-site coulombic repulsion in the dication. An X-ray structure analysis of the neutral 4,5-dimethyl-4',5'-bis(methylthio) derivatives (1Be) reveals that the crystal has a so-called 'K-type array' of molecules. An MNDO molecular orbital calculation indicates that the sulfur atoms at the termini of the vinylogous 1,3-dithiole rings are out of phase with the other sulfur atoms in the HOMO. The present donors have produced many molecular complexes exhibiting high conductivity. In particular, all of the radical-cation salts based on 1Aa obtained so far exhibit metallic conducting behaviour down to 1.4-4.2 K, regardless of the counter-anions.

    DOI: 10.1039/jm9950501571

  • Structures and conducting properties of CPTM-TTP salts 査読

    Y Misaki, K Kawakami, H Fujiwara, T Yamabe, T Mori, H Mori, S Tanaka

    CHEMISTRY LETTERS   ( 12 )   1125 - 1126   1995年( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    The title donor, CPTM-TTP (4,5-cyclopenteno-4',5'-bis(methylthio)-2,5-bis(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene) has produced metallic cation radical salts with octahedral and linear anions. Among them, (CPTM-TTP)(4)AsF6 has a two-dimensional ''beta-type'' arrangement of donor molecules and a closed Fermi surface.

    DOI: 10.1246/cl.1995.1125

  • CRYSTAL-STRUCTURE AND PHYSICAL-PROPERTIES OF (BDT-TTP)2CLO4 査読

    T MORI, Y MISAKI, H FUJIWARA, T YAMABE

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   67 ( 10 )   2685 - 2689   1994年10月( ISSN:0009-2673

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    掲載種別:研究論文(学術雑誌)  

    The ClO4, BF4, and ReO4 salts of BDT-TTP, 2,5-bis(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene, are isostructural, having uniform columns of the donor molecules. These salts are essentially metallic down to low temperatures, though the resistivity increases to some extent below 200 K. The thermoelectric power and ESR show simple metal-like behavior down to low temperatures.

    DOI: 10.1246/bcsj.67.2685

  • STRUCTURE AND CONDUCTING PROPERTIES OF BDT-TTP SALTS 査読

    Y MISAKI, H FUJIWARA, T YAMABE, T MORI, H MORI, S TANAKA

    CHEMISTRY LETTERS   ( 9 )   1653 - 1656   1994年09月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    Many cation radical salts of BDT-TTP (2,5-bis(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene) showed metallic conducting behavior down to 0.6-1.2 K. X-Ray crystal structure analysis of (BDT-TTP)(2)SbF6 revealed that this salt has a two-dimensional ''beta-type'' arrangement of donor molecules in the conducting sheet.

    DOI: 10.1246/cl.1994.1653

  • 2-(1',3'-DITHIOL-2'-YLIDENE)-5-(THIOPYRAN-4'-YLIDENE)-1,3,4,6-TETRATHIAPENTALENE - A NOVEL BIS-FUSED PI-ELECTRON DONOR 査読

    Y MISAKI, H FUJIWARA, T YAMABE

    JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS   ( 11 )   949 - 951   1993年06月( ISSN:0022-4936

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    掲載種別:研究論文(学術雑誌)  

    The synthesis and electrochemical properties of the title compound and its derivatives are described; the electrical properties of their charge-transfer complexes and cation radical salts are also presented.

    DOI: 10.1039/c39930000949

  • PREPARATION, CRYSTAL-STRUCTURE AND ELECTRICAL-PROPERTIES OF 2-CYCLOPENTANYLIDENE-1,3-DITHIOLO[4,5-D]TETRATHIAFULVALENE DERIVATIVES 査読

    Y MISAKI, K KAWAKAMI, H NISHIKAWA, H FUJIWARA, T YAMABE, M SHIRO

    CHEMISTRY LETTERS   ( 3 )   445 - 448   1993年03月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)  

    The title compounds (1) were prepared as the donor components for organic conductors. The molecular and crystal structures of bis(methylthio) derivative were determined by X-ray diffractional analysis. Among charge-transfer complexes and cation radical salts of 1 prepared so far, I3- salt of unsubstituted-1 and IBr2- salt of methylenedithio-1 showed metallic temperature dependence of conductivities.

  • (2-METHYLIDENE-1,3-DITHIOLO[4,5-D])TETRATHIAFULVALENE (DT-TTF) - NEW UNSYMMETRICAL TTFS CONDENSED WITH 1,3-DITHIOL-2-YLIDENE MOIETIES 査読

    Y MISAKI, H NISHIKAWA, H FUJIWARA, K KAWAKAMI, T YAMABE, H YAMOCHI, G SAITO

    JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS   ( 19 )   1408 - 1409   1992年10月( ISSN:0022-4936

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    掲載種別:研究論文(学術雑誌)  

    The synthesis and properties of the unsymmetrical tetrathiafulvalenes condensed with 1,3-dithiol-2-ylidene moieties are described; the electrical properties of several cation radical salts are also presented.

    DOI: 10.1039/c39920001408

▼全件表示

書籍等出版物

  • 機能性色素の合成と応用技術

     ( 担当: 共著)

    シーエムシー出版  2007年10月 

     詳細を見る

    担当ページ:174-190  

  • 実験化学講座第5版第7巻

     ( 担当: 共著)

    丸善  2004年03月 

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    担当ページ:72-88  

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     詳細を見る

    会議種別:ポスター発表  

  • ピリジル基を導入したジシアノメチルラジカルの動的共有結合性および金属錯体の形成挙動 国内会議

    長谷川大輝, 酒巻大輔, 藤原秀紀

    分子エレクトロニックデバイス研究所&機能性有機材料開発研究センター 合同研究会  2022年11月 

     詳細を見る

    会議種別:ポスター発表  

  • インダンジオン骨格を有するスクアレン色素の合成と有機近赤外フォトディテクターへの応用 国内会議

    前田壮志,田中大気,八木繁幸,藤原秀紀

    第32回基礎有機化学討論会  2022年09月 

     詳細を見る

    会議種別:ポスター発表  

  • ジアザテトラセンが縮合した新規π拡張型TTFドナーの開発 国内会議

    中井美裕,西村友樹,加藤華,北所幸奈,酒巻大輔, 藤原秀紀

    第32回基礎有機化学討論会  2022年09月 

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    会議種別:ポスター発表  

  • ピラー状π置換基を有するフタロシアニンの会合挙動の検討 国内会議

    坪野洸輝, 酒巻大輔, 藤原秀紀

    第32回基礎有機化学討論会  2022年09月 

     詳細を見る

    会議種別:ポスター発表  

  • ピリジル基を有するジシアノメチルラジカルの動的共有結合性および錯形成挙動 国内会議

    長谷川大輝, 酒巻大輔, 藤原秀紀

    第32回基礎有機化学討論会  2022年09月 

     詳細を見る

    会議種別:ポスター発表  

  • 含窒素ダブルヘテロヘリセンラジカルカチオン塩の結晶構造と物性 国内会議

    関口日和,酒巻大輔, 鈴木修一,藤原秀紀

    第32回基礎有機化学討論会  2022年09月 

     詳細を見る

    会議種別:ポスター発表  

  • 非対称ヘテロアセンを用いた軸性キラルD-A型分子の合成と電子的性質 国内会議

    石川周平, 酒巻大輔, 藤原秀紀

    第32回基礎有機化学討論会  2022年09月 

     詳細を見る

    会議種別:ポスター発表  

  • メカノケミカル反応によるヘテロヘリセン及びヘテロナノグラフェンの合成法の開発 国内会議

    佐田帆香, 酒巻大輔, 藤原秀紀

    第32回基礎有機化学討論会  2022年09月 

     詳細を見る

    会議種別:ポスター発表  

  • D-A型アントラキノン複合分子のクロミック挙動 国内会議

    早川諒, 酒巻大輔, 藤原秀紀

    2022年光化学討論会  2022年09月 

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    会議種別:ポスター発表  

  • オキソカーボン中心骨格を持つ近赤外吸収ポリメチン色素のジラジカル特性 国内会議

    岡大志, 前田壮志, 酒巻大輔, 藤原秀紀, 八木繁幸, 小西龍生, 鎌田賢司

    日本化学会第102春季年会  2022年03月 

  • 非対称型ヘテロアセンを用いた軸性キラル分子の合成と電子的性質 国内会議

    石川周平, 藤原秀紀, 酒巻大輔

    日本化学会第102春季年会  2022年03月 

  • Benzo[b]phenoxazine および benzo[b]phenothiazine の酸化的二量化によるダブルヘテロヘリセンの合成と構造・電子的性質 国内会議

    田中駿也・田中克輝・瀧野真由・酒巻大輔・藤原秀紀

    第31回基礎有機化学討論会  2021年09月 

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    会議種別:ポスター発表  

  • フラビリウム骨格とオキソカーボン酸残基からなるポリメチン色素の開殻性評価 国内会議

    大野友彰・岡大志・前田壮志・酒巻大輔・藤原秀紀・八木繁幸

    第31回基礎有機化学討論会  2021年09月 

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    会議種別:ポスター発表  

  • 1 つまたは 2 つのジシアノメチルラジカルを導入したフェロセン誘導体の合成と動的共有結合特性 国内会議

    石本実里・酒巻大輔・藤原秀紀

    第31回基礎有機化学討論会  2021年09月 

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    会議種別:ポスター発表  

  • 1,3-ジチオール環を置換した新規スクアライン色素の合成と物性 国内会議

    村田司・酒巻大輔・岡大志・前田壮志・八木繁幸・藤原秀紀

    第31回基礎有機化学討論会  2021年09月 

     詳細を見る

    会議種別:ポスター発表  

  • ジアザキノイド骨格を有する拡張型 TTF 分子の開発 国内会議

    溝川舜介・松田瞳・酒巻大輔・藤原秀紀

    第31回基礎有機化学討論会  2021年09月 

     詳細を見る

    会議種別:ポスター発表  

  • 配位結合部位としてのピリジル基を有する動的共有結合性ラジカルの開発 国内会議

    長谷川大輝・酒巻大輔・藤原秀紀

    第31回基礎有機化学討論会  2021年09月 

     詳細を見る

    会議種別:ポスター発表  

  • フェノキシラジカルを導入した拡張 TTF 誘導体の開発 国内会議

    服部美鈴・酒巻大輔・藤原秀紀

    第31回基礎有機化学討論会  2021年09月 

     詳細を見る

    会議種別:ポスター発表  

  • オキソカーボン酸を中心骨格に持つ近赤外吸収ポリメチン色素の中間的な開殻性 国内会議

    岡大志・前田壮志・酒巻大輔・藤原秀紀・八木繁幸

    第31回基礎有機化学討論会  2021年09月 

     詳細を見る

    会議種別:ポスター発表  

  • フラビリウム骨格とオキソカーボン酸残基からなる近赤外吸収色素の合成と物性 国内会議

    大野 友彰、前田 壮志、酒巻 大輔、岡 大志、八木 繁幸、藤原 秀紀

    日本化学会第101春季年会  2021年03月  日本化学会

     詳細を見る

    会議種別:ポスター発表  

  • 含窒素ヘテロテトラセンの酸化的二量化によるダブルヘテロヘリセンの合成・構造・原始的性質 国内会議

    田中 駿也、酒巻 大輔、藤原 秀紀

    日本化学会第101春季年会  2021年03月  日本化学会

     詳細を見る

    会議種別:ポスター発表  

  • ジアザキノイド骨格を有する拡張型TTF分子の開発 国内会議

    溝川 舜介、酒巻 大輔、藤原 秀紀

    日本化学会第101春季年会  2021年03月  日本化学会

     詳細を見る

    会議種別:ポスター発表  

  • 1,3-ジチオール環を置換した新規スクアライン色素の合成と物性 国内会議

    村田 司、酒巻 大輔、岡 大志、前田 壮志、八木 繁幸、藤原 秀紀

    日本化学会第101春季年会  2021年03月  日本化学会

     詳細を見る

    会議種別:ポスター発表  

  • ジシアノメチルラジカルを導入したフェロセン誘導体の合成と動的共有結合特性 国内会議

    石本 実里、酒巻 大輔、藤原 秀紀

    日本化学会第101春季年会  2021年03月  日本化学会

     詳細を見る

    会議種別:ポスター発表  

  • フェノキシラジカルを導入した拡張TTF誘導体の開発 国内会議

    服部 美鈴、酒巻 大輔、藤原 秀紀

    日本化学会第101春季年会  2021年03月  日本化学会

     詳細を見る

    会議種別:ポスター発表  

  • 拡張キノン骨格を有する TTF の合成、構 造および動的レドックス特性 国内会議

    三岡 美紗稀、酒巻 大輔、藤原 秀紀

    基礎有機化学会 若手オンラインシンポジウム  2020年11月  基礎有機化学会

     詳細を見る

    会議種別:ポスター発表  

  • 異なる位置で連結したジヒドロジアザテ トラセン二量体の合成と電子的性質 国内会議

    田中 克輝、酒巻 大輔、藤原 秀紀

    基礎有機化学会 若手オンラインシンポジウム  2020年11月  基礎有機化学会

     詳細を見る

    会議種別:ポスター発表  

▼全件表示

産学官連携可能研究(シーズ)概要

  • 機能性物質の物性評価

     詳細を見る

    機能性物質の室温からヘリウム温度までの電気伝導性・磁性の評価

  • 機能性物質の構造解析

     詳細を見る

    結晶性の機能性物質の単結晶構造解析を行う。

担当授業科目

  • 物理化学特論A

    2023年度   週間授業   大学院

  • 物理化学特論A

    2022年度   週間授業   大学院

  • 機能物質化学I

    2023年度   週間授業   大学

  • 分子科学実験II

    2022年度   週間授業   大学

  • 化学熱力学

    2023年度   週間授業   大学

  • 化学熱力学

    2022年度   週間授業   大学

  • 物理化学演習I

    2023年度   週間授業   大学

  • 機能物質化学I

    2022年度   週間授業   大学

  • 分子科学実験II

    2023年度   週間授業   大学

  • 物理化学演習I

    2022年度   週間授業   大学

  • マテリアルとものづくり

    2022年度   週間授業   大学

  • 研究企画ゼミナール

    2023年度   集中講義   大学院

  • 分子科学課題実習

    2023年度   実習   大学

  • 分子科学演習II

    2023年度   集中講義   大学

  • 分子科学演習I

    2023年度   集中講義   大学

  • 分子科学卒業研究

    2023年度   実習   大学

  • 化学特別研究1A

    2022年度   集中講義   大学院

  • 研究企画ゼミナール

    2022年度   集中講義   大学院

  • 化学特別演習1A

    2022年度   集中講義   大学院

  • プロポーザルディフェンス (中百舌鳥)

    2022年度   集中講義   大学院

  • 化学特別演習1B (中百舌鳥)

    2022年度   集中講義   大学院

  • 化学特別研究1B (中百舌鳥)

    2022年度   集中講義   大学院

  • サイエンスコミュニケーションII(分子科学)

    2022年度     大学院

  • サイエンスコミュニケーションI(分子科学)

    2022年度     大学院

  • 分子科学特別研究IIB

    2022年度   実習   大学院

  • 分子科学特別研究IIA

    2022年度   実習   大学院

  • 分子科学特別演習II

    2022年度   集中講義   大学院

  • 分子科学演習II

    2022年度   集中講義   大学

  • 分子科学演習I

    2022年度   集中講義   大学

  • 分子科学卒業研究

    2022年度   実習   大学

  • 分子科学課題実習

    2022年度   実習   大学

  • マテリアルとものづくり

    2021年度    

  • 分子科学研究への招待

    2021年度    

  • サイエンスコミュニケーションI(分子科学)

    2021年度    

  • 分子科学特別演習II

    2021年度    

  • 分子科学特別演習I

    2021年度    

  • 分子科学実験II

    2021年度   実習  

  • 分子科学演習II

    2021年度    

  • 分子科学演習I

    2021年度    

  • 分子科学特別研究IIB

    2021年度   実習  

  • 分子科学特別研究IIA

    2021年度   実習  

  • 分子科学特別研究IB

    2021年度   実習  

  • 分子科学特別研究IA

    2021年度   実習  

  • 分子科学課題実習

    2021年度   実習  

  • 卒業研究

    2021年度   実習  

  • 機能物質化学I

    2021年度    

  • 物理化学演習I

    2021年度    

  • 物理化学特論

    2021年度    

  • 化学熱力学

    2021年度    

▼全件表示

学外での担当授業科目

  • 無機化学特論A(神戸大学理学研究科)

    2020年11月
    -
    2020年12月
    機関名:神戸大学

     詳細を見る

    科目区分:大学院専門科目 

  • 無機化学特論C(神戸大学理学研究科)

    2020年11月
    -
    2020年12月
    機関名:神戸大学

     詳細を見る

    科目区分:大学院専門科目 

社会貢献活動

  • 高校生・高専生科学技術チャレンジ(JSEC)の審査委員

    2023年04月 - 2024年03月

     詳細を見る

    高校生・高専生科学技術チャレンジ(JSEC)の審査委員を担当し、高校生の研究発表に対する評価コメントを通じて、科学啓発に向けた取り組みを行った。

  • さくらサイエンスプランで来日した外国人大学生に対する授業

    2022年12月

     詳細を見る

    種別:出前授業

  • 高校生・高専生科学技術チャレンジ(JSEC)の審査委員

    2022年04月 - 2023年03月

     詳細を見る

    高校生・高専生科学技術チャレンジ(JSEC)の審査委員を担当し、高校生の研究発表に対する評価コメントを通じて、科学啓発に向けた取り組みを行った。

  • さくらサイエンスプランで来日した外国人大学生に対する授業

    2021年12月

  • 神戸大学非常勤講師

    2020年11月 - 2020年12月

     詳細を見る

    神戸大学大学院理学研究科の特別講義(無機化学特論A)を担当した

  • 高校生・高専生科学技術チャレンジ(JSEC)の審査委員

    2020年04月 - 2022年03月

     詳細を見る

    高校生・高専生科学技術チャレンジ(JSEC)の審査委員を担当し、高校生の研究発表に対する評価コメントを通じて、科学啓発に向けた取り組みを行った。

  • さくらサイエンスプランで来日した外国人大学生に対する授業や実験指導

    2019年12月

  • 堺市立堺高校 プロフェッサーズセミナー 光を使った機能性材料

    2019年04月 - 2020年03月

  • 大阪府立三国丘高校 実験教室 電気を通すプラスチック 〜導電性ポリマーの作製〜

    2018年04月 - 2019年03月

  • 大阪府立三国丘高校 三丘セミナー 光を使った機能性材料

    2018年04月 - 2019年03月

  • 大阪府立和泉高校 実験教室 電気を通すプラスチック 〜導電性ポリマーの作製〜

    2016年04月 - 2017年03月

  • 大阪府立泉北高校 大学訪問実習 電気を通すプラスチック 〜導電性ポリマーの作製〜

    2016年04月 - 2017年03月

  • 教員免許状更新講習 光が関係する様々な機能性材料

    2015年04月 - 2016年03月

  • 大阪府立泉北高校 大学訪問実習 電気を通すプラスチック 〜導電性ポリマーの作製〜

    2015年04月 - 2016年03月

  • 高校生のためのサイエンスフォーラム 光を使った機能性材料

    2015年04月 - 2016年03月

  • 大阪府立泉北高校 高大連携講座 光を使った機能性材料 〜太陽電池, ELなどの仕組み〜

    2014年04月 - 2015年03月

  • 堺市立堺高校 プロフェッサーズセミナー 光を使った機能性材料

    2012年04月 - 2013年03月

  • 大阪府立泉北高校 大学訪問実習 電気を通すプラスチック 〜導電性ポリマーの作製〜

    2012年04月 - 2013年03月

  • 大阪府立鳳高校 模擬授業 光を使った機能性材料 〜EL、液晶、太陽電池などの仕組み〜

    2011年04月 - 2012年03月

  • 大阪府立大手前高校 模擬授業 光を使った機能性材料 〜EL、液晶、太陽電池などの仕組み〜

    2011年04月 - 2012年03月

  • りそなグループ技術懇親会「金属錯体の優れた機能と実用性を探る」 分子性磁性伝導体

    2010年04月 - 2011年03月

  • サマーサイエンスセミナー 電気を通すプラスティック ~導電性ポリマーの作製~

    2010年04月 - 2011年03月

  • CM2セミナー 磁性と伝導性を併せ持つ分子性伝導体の開発

    2003年04月 - 2004年03月

  • 先端研交流会 磁性と伝導性の双機能性を有する有機伝導体の開発

    2003年04月 - 2004年03月

▼全件表示

出張講義テーマ ⇒ 出張講義一覧へ

  • 光を使った機能性材料

    分野:理学(数学,物理学,化学,生物学,地球学,生物化学), 工学(機械,電子・物理,電気電子,電機情報,化学バイオ,建築,都市(土木・環境),物質化学,航空宇宙,海洋システム,応用化学,化学,マテリアル)

     詳細を見る

    対象:中学生, 高校生, 大学生, 社会人・一般

    キーワード:光機能性材料, 有機物 

    光を電気に変える太陽光発電や、電気から光を生み出すEL材料、光ディスクを使った記録材料、染料、色素など、世の中には光に関連した役立つもの~機能性材料~があふれています。本講義ではその仕組みについて解説します。