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2006 Fiscal Year Annual Research Report

複合機能有機材料(超伝導・スピン液体・新規相転移等)の開発

Research Project

Project/Area Number 15205019
Research InstitutionKyoto University

Principal Investigator

齋藤 軍治  京都大学, 大学院理学研究科, 教授 (40132724)

Co-Investigator(Kenkyū-buntansha) 矢持 秀起  京都大学, 低温物質科学研究センター, 教授 (20182660)
前里 光彦  京都大学, 大学院理学研究科, 助手 (60324604)
大塚 晃弘  京都大学, 低温物質科学研究センター, 助手 (90233171)
Keywords分子性超伝導体 / 一軸性歪み / 金属-絶縁体転移 / 光誘起相転移 / イオン液体 / 核酸塩基導電体 / 双性化合物 / フラーレン
Research Abstract

新規π-d複合系(DIETSe)_2FeCl_4に着目し、擬一次元電子系の金属不安定性と局在磁性イオンとの相互作用による特異な磁気輸送特性について調べた。微小単結晶の磁気トルク測定により、Feスピンのスピンフロップ現象の観測に成功した。また、磁気抵抗がスピンフロップ磁場の直上で急激に変化する現象を見出し、その変化率が12kbarの静水圧下では約130%にも達する事を明らかにした。
核酸塩基の一つであるシトシンとTCNQ誘導体との電荷移動錯体形成について検討した。反応生成物について調べた結果、錯体形成には溶媒として用いたメタノールとの反応とシトシンのプロトン化が重要なプロセスであることを明らかにした。
ビニル位水素を99%重水素化した(EDO-TTF)_2X(X=PF_6,AsF_6)が、軽水素体よりも約3K高い金属-絶縁体転移温度を示す事を見いだした。ビニル位水素のひとつをメチル基で置換したEDO-TTF誘導体を用いて、低温まで金属状態を保つ錯体を得た。チオピラン環とジチオール環を併せ持つTP-EDOTから、3次元的に配列した局在スピンが2次元的なスピン間相互作用を示す錯体を得た。
様々なアルキル鎖を持つ1-アルキル-3-メチルイミダゾリウムの溶融塩を作製し、アルキル鎖長とともにイオン会合度は増大し、伝導性が低下することを明らかにした。また、ピロリジニウムや2,2'-ビイミダゾリウムの塩では、伝導性は低下するものの弱いプロトン供与能に起因してイオン会合度が抑制された。
イオン性フラーレン錯体中に、C_<60>アニオンラジカル同士が2本の単結合で結合したダイマーが存在することを初めて確認した。また、磁気的測定から、このダイマーは基底状態一重項のシングレット-トリプレットモデルで理解できる振る舞いを示すと同時に、強い分子間反強磁性相互作用も示すことも明らかにした。

  • Research Products

    (43 results)

All 2007 2006 Other

All Journal Article (41 results) Book (2 results)

  • [Journal Article] Development of conductive organic molecular assemblies : Organic metals, superconductors, and exotic functional materials.2007

    • Author(s)
      G.Saito
    • Journal Title

      Bulletin of the Chemical Society of Japan 80(1)

      Pages: 1-137

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Mesomeric fused betainic radicals as organic conductors.2007

    • Author(s)
      G.Saito
    • Journal Title

      Multifunctional Conducting Molecular Materials

      Pages: 3-14

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Charge transfer complexes of cytosine and TCNQ derivatives.2007

    • Author(s)
      K.Nishimura
    • Journal Title

      Multifunctional Conducting Molecular Materials

      Pages: 49-54

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Crystal structures and physical properties of (Mo_6X_<14>)^<2-> salts (X=Br, I).2007

    • Author(s)
      H.Hosoda
    • Journal Title

      Multifunctional Conducting Molecular Materials

      Pages: 79-82

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Charge disproportionation with metallic conductivity in new ET salt, (ET)_3(AuBr_2)_2(AuBr_4)_2(solv)_x, having a peculiar crystal structure.2007

    • Author(s)
      M.Sakata
    • Journal Title

      Multifunctional Conducting Molecular Materials

      Pages: 91-96

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Recent progress of (EDO-TTF)_2PF_6 and related complexes.2007

    • Author(s)
      H.Yamochi
    • Journal Title

      Multifunctional Conducting Molecular Materials

      Pages: 107-114

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Syntheses and properties of tetrathiafulvalene-pendent iron complexes.2007

    • Author(s)
      J.Hagiwara
    • Journal Title

      Multifunctional Conducting Molecular Materials

      Pages: 169-172

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Gigantic and ultrafast photoresponse in molecular charge ordering system.2007

    • Author(s)
      M.Chollet
    • Journal Title

      Multifunctional Conducting Molecular Materials

      Pages: 173-180

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] New α'-type ET salt (ET)_2H_2F_3 by electrocrystallization using ionic liquid.2007

    • Author(s)
      Y.Yoshida
    • Journal Title

      Chemistry Letters 36(2)

      Pages: 226-227

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Crystal structures and physical properties of (EDO-TTF) _5(BF_4)_3 and (EDO-TTF)_4(Sb_2F_<11>)_<0.85>(H_20)_4.2007

    • Author(s)
      A.Ota
    • Journal Title

      Multifunctional Conducting Molecular Materials

      Pages: 115-118

  • [Journal Article] Ionicity intramolecular charge transfer compounds in solution.2007

    • Author(s)
      G.Honda
    • Journal Title

      Multifunctional Conducting Molecular Materials

      Pages: 119-112

  • [Journal Article] Structures and thermal behavior of intramolecular charge transfer compounds C_n-H_3CNQ derived from the reaction between 1-alkyl-3, 3-dimethyl-2-methyleneindoline and 7,7,8,8-tetracyanoquinodimethane (TCNQ).2007

    • Author(s)
      Y.Enomoto
    • Journal Title

      Multifunctional Conducting Molecular Materials

      Pages: 123-126

  • [Journal Article] Formation of antiferromagnetically coupled C_<60> and diamagnetic (C_<70>)_2 dimers in ionic complexes of fullerenes with (MDABCO^+)_2・ MIITPP (M=Zn, Co, Mn, and Fe) assemblies.2007

    • Author(s)
      D.V.Konarev
    • Journal Title

      Inorganic Chemistry 46(6)

      Pages: 2261-2271

  • [Journal Article] Surface tension measurements of highly conducting ionic liquids.2006

    • Author(s)
      W.Martino
    • Journal Title

      Green Chemistry 8(4)

      Pages: 390-397

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Phenalenyl-based highly conductive molecular systems with hydrogen-bonded networks : Synthesis, physical properties, and crystal structures of 1,3- and 1,6-diazaphenalenes, and their protonated salts and charge-transfer complexes with TCNQ.2006

    • Author(s)
      T.Murata
    • Journal Title

      Bulletin of the Chemical Society of Japan 79(6)

      Pages: 894-913

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Ionic multi-component complexes of fullerenes : Structures and magnetic properties.2006

    • Author(s)
      D.V.Konarev
    • Journal Title

      Fullerenes, Nanotubes, and Carbon Nanostructures 14(2-3)

      Pages: 349-356

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Organic superconductors.2006

    • Author(s)
      G.Saito
    • Journal Title

      Molecular Crystals and Liquid Crystals 455

      Pages: 31-46

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Ultra-fast and highly efficient photo induced phase transition in (EDO-TTF)_2PF_6.2006

    • Author(s)
      H.Yamochi
    • Journal Title

      Molecular Crystals and Liquid Crystals 455

      Pages: 105-112

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Anomalous magnetoresistance in the π-d system (DIETSe)_2FeCl_4.2006

    • Author(s)
      M.Maesato
    • Journal Title

      Molecular Crystals and Liquid Crystals 455

      Pages: 123-127

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Ink-jet printing of organic metal electrodes using charge-transfer compounds.2006

    • Author(s)
      M.Hiraoka
    • Journal Title

      Applied Physics Letters 89(17)

      Pages: 173504, 1-3

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Properties of reaction products between cytosine and F_4TCNQ in MeOH : Two hemiprotonated cytosine salts with F_4TCNQ radical anion and methoxy adduct anion.2006

    • Author(s)
      T.Murata
    • Journal Title

      Chemistry Letters 35(12)

      Pages: 1342-1343

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Preparation of superconducting (TMTSF)_2NbF_6 by electrooxidation of TMTSF usingionic liquid as electrolyte.2006

    • Author(s)
      M.Sakata
    • Journal Title

      Molecular Crystals and Liquid Crystals 452

      Pages: 103-112

  • [Journal Article] Emergence of inhomogeneous moments from spin liquid in the triangular-lattice Mott insulator κ-(ET)_2Cu _2(CN)_3.2006

    • Author(s)
      Y.Shimizu
    • Journal Title

      Physical Review B : Condensed Matter and Materials Physics 73(14)

      Pages: 140407, 1-4

  • [Journal Article] Synthesis, crystal structures, magnetic properties and photoconductivity of C_<60> and C_<70> complexes with metal dialkyldithiocarbamates M(R_2dtc)_x where M =Cu^II, Cu^I, Ag^I, Zn^<II>, Cd^<II>, Hg^<II>, Mn^<II>, Ni^<II>, and Pt^<II>; R = Me, Et, and nPr.2006

    • Author(s)
      D.V.Konarev
    • Journal Title

      European Journal of Inorganic Chemistry (9)

      Pages: 1881-1895

  • [Journal Article] Molecular-fastener effects on transport property of TTC_n TTF field-effect transistors.2006

    • Author(s)
      S.Ukai
    • Journal Title

      Colloids and Surfaces, A : Physicochemical and Engineering Aspects 284+285

      Pages: 589-593

  • [Journal Article] Negatively charged π-(C_<60>)_2 dimer with biradical state at room temperature.2006

    • Author(s)
      D.V.Konarev
    • Journal Title

      Journal of the American Chemical Society 128(29)

      Pages: 9292-9293

  • [Journal Article] Polarization of charge-transfer bands and rectification in hexadecylquinolinium 7,7,8-tricyanoquinodimethanide and its tetrafluoro analog.2006

    • Author(s)
      A.Honciuc
    • Journal Title

      Journal of Physical Chemistry B 110(31)

      Pages: 15085-15093

  • [Journal Article] Peculiarities of C_<60> coordination to cobalt(II) octaethylporphyrin in ionic multicomponent complexes : Observation of the reversible formation of Co-C(C_<60>) coordination bonds.2006

    • Author(s)
      D.V.Konarev.
    • Journal Title

      Chemistry-A European Journal 12(20)

      Pages: 5225-5230

  • [Journal Article] Structural aspects of two-stage dimerization in an ionic C_<60> complex with bis(benzene)chromium : Cr(C_6H_6)_2・C_<60>・C_6H_4Cl_22006

    • Author(s)
      D.V.Konarev
    • Journal Title

      Dalton Transactions (30)

      Pages: 3716-3720

  • [Journal Article] New organic conductors based on dibromo- and diiodo-TSeFs with magnetic and non-magnetic MX_4 counter anions (M = Fe, Ga; X = Cl, Br).2006

    • Author(s)
      T.Shirahata
    • Journal Title

      Journal of Materials Chemistry 16(33)

      Pages: 3381-3390

  • [Journal Article] Spin liquid state inκ-(BEDT-TTF)_2Cu_2(CN)_3 studied by muon spin relaxation method.2006

    • Author(s)
      S.Ohira
    • Journal Title

      Journal of Low Temperature Physics 142(3/4)

      Pages: 153-158

  • [Journal Article] (TP-EDOT)_2PF_6 - Two-dimensional spin array in a three-dimensional lattice.2006

    • Author(s)
      H.Yamochi
    • Journal Title

      Journal of Low Temperature Physics 142(3/4)

      Pages: 285-290

  • [Journal Article] Coexistence of quasi-one- and -two-dimensional electronic structures in (EDO-TTF)_2X (X=GaC1_4, ReO_4).2006

    • Author(s)
      A.Ota
    • Journal Title

      Journal of Low Temperature Physics 142(3/4)

      Pages: 425-428

  • [Journal Article] A hybrid material based on [Mo_6Br_(14)]^<2-> inorganic cluster units and [BEDO-TTF]^+ organic monocationic radicals : Synthesis, structure and properties of (BEDO-TTF)_2Mo_6Br_(14)(PhCN)_4.2006

    • Author(s)
      K.Kirakci
    • Journal Title

      Journal of Solid State Chemistry 179(12)

      Pages: 3628-3685

  • [Journal Article] Depressed charge gap in the triangular-lattice Mott insulator κ-(ET)_2Cu_2(CN)_3.2006

    • Author(s)
      I.Kezsmarki
    • Journal Title

      Physical Review B : Condensed Matter and Materials Physics 74(20)

      Pages: 201101, 1-4

  • [Journal Article] 有機伝導体κ-(ET)_2Xのスピン液体と超伝導-キャリアードーピング、バンド幅・バンドの異方性制御-2006

    • Author(s)
      前里 光彦
    • Journal Title

      物性研究 87(2)

      Pages: 201-213

  • [Journal Article] Organic conductor based on nucleobase : Structural and edectronic properties of a charge transfer solid composed of TCNQ anion radical and hemiprotonated cytosine.

    • Author(s)
      T.Murata
    • Journal Title

      Molecular Crystals and Liquid Crystals (印刷中)

  • [Journal Article] Mixed valency in organic charge transfer complexes.

    • Author(s)
      G.Saito
    • Journal Title

      Philosophical Transactions of the Royal Society of London, Series A (印刷中)

  • [Journal Article] Phase transition from Mott insulating phase into charge ordering phase with molecular deform-ation in the charge transfer salts κ-(BEDT-TTF)_4[M(CN)_6][N(C_2H_5)_4]・2H_2O (M=Co^<III> and Fe^<III>).

    • Author(s)
      A.Ota
    • Journal Title

      Chemistry of Materials (印刷中)

  • [Journal Article] Ionic liquids based on dicyanamide anion : Influence of structural variations in cationic structures on ionic conductivity.

    • Author(s)
      Y.Yoshida
    • Journal Title

      Journal of Physical Chemisty B (印刷中)

  • [Journal Article] Formation and properties of (C_<60>)_2 dimers of fullerenes bonded by one and two π-bonds in ionic complexes.

    • Author(s)
      D.V.Konarev
    • Journal Title

      Molecular Crystals and Liquid Crystals (印刷中)

  • [Book] Science and Engineering of the Future with Multifunctional Conducting Molecular Materials.2007

    • Author(s)
      G.Saito
    • Total Pages
      305
    • Publisher
      Royal Society of Chemistry
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] 有機物性化学の基礎2006

    • Author(s)
      齋藤 軍治
    • Total Pages
      206
    • Publisher
      化学同人
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2008-05-08   Modified: 2016-04-21  

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