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Magnetic and Structural Properties of Molecule-based Magnetic Materials

Research Project

Project/Area Number 19550139
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional materials chemistry
Research InstitutionTokyo Metropolitan University

Principal Investigator

FUJITA Wataru  Tokyo Metropolitan University, 大学院・理工学研究科, 准教授 (50292719)

Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2007: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords有機ラジカル / 結晶構造 / 磁気的性質 / 相転移 / 構造変化 / 結晶構造解析 / 電気伝導性
Research Abstract

分子性物質で様々な磁気特性を実現するため、環状チアジルラジカル誘導体と反磁性アニオンとの塩結晶を調製し、系統的に結晶構造解析並びに磁気測定を行った。環状チアジルラジカルBBDTA+はサイズの異なる様々な正四面体アニオンと組み合わせることで強磁性、メタ磁性や反強磁性等の秩序磁性やspin-Peierls転移等、多彩な磁気挙動を従来の分子磁性体と比べても高い磁気転移温度で実現することに成功した。本来二量化しやすい有機ラジカルをカチオンとして、適切な対アニオンと組み合わせる手法は高い機能を有する分子性磁性物質を合成する上で、単純かつ有効な方法であることを明らかにした。

Report

(3 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • Research Products

    (32 results)

All 2009 2008 2007

All Journal Article (14 results) (of which Peer Reviewed: 5 results) Presentation (18 results)

  • [Journal Article] Magneto-Structural Correlations in a 1,3,2-Dithiazolyl Radical Crystal, BBDTA・GaBr_4 : Structure and Magnetic Properties of its Three Polymorphs2009

    • Author(s)
      W. Fujita, K. Kikuchi
    • Journal Title

      Chem. Asian J. 4

      Pages: 400-405

    • Related Report
      2008 Final Research Report
  • [Journal Article] Magneto-Structural Correlations in a 1, 3, 2-Dithiazolyl Radical Crystal, BBDTA・GaBr_4…2009

    • Author(s)
      W. Fujita, K. Kikuchi
    • Journal Title

      Chemistry An Asian Journal 3

      Pages: 400-405

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structural Study on a Dimerization Process in an Organic Magnet, BBDTA・InBr_42008

    • Author(s)
      W. Fujita, K. Kikuchi, and K. Awaga
    • Journal Title

      Angew. Chem. Int. Ed. 47

      Pages: 9480-9483

    • Related Report
      2008 Final Research Report
  • [Journal Article] Pressure-induced ferromagnetic to nonmagnetic transition of the thiazyl-based organic ferromagnet γ-BBDTA・GaCl_42008

    • Author(s)
      M. Mito, M. Fujino, Y. Komorida, H. Deguchi, S. Takagi, W. Fujita, K. Awaga
    • Journal Title

      J. Phys. Soc. Jpn. 77

    • Related Report
      2008 Final Research Report
  • [Journal Article] Electronic structure of 1,3,5-trithia-2,4,6- triazapentalenyl on gold2008

    • Author(s)
      K. Iketaki, K. Kanai, W. Fujita, K. Awaga, J. Tsutsumi, H. Yoshida, N. Sato, M. Knupfer, Y. Ouchi, K. Seki
    • Journal Title

      Chem. Phys. Lett. 451

      Pages: 58-62

    • Related Report
      2008 Final Research Report
  • [Journal Article] Diverse magnetic and electrical properties of molecular solids containing the thiazyl radical BDTA2008

    • Author(s)
      K. Awaga, Y. Umezono, W. Fujita, H. Yoshikawa, H.-B. Cui, H. Kobayashi, S.S. Staniland, N. Robertson
    • Journal Title

      Inorg. Chim. Acta 361

      Pages: 3761-3770

    • Related Report
      2008 Final Research Report
  • [Journal Article] Structural Study on a Dimerization Process in an Organic Magnet, BBDTA・InBr_42008

    • Author(s)
      W. Fujita, K. Kikuchi, K. Awaga
    • Journal Title

      Angew. Chera. Int. Ed. 47

      Pages: 9480-9483

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Charge ordering and nonlinear electrical transport in quasi-1D organic chains with strong electrostatic interchain interactions2007

    • Author(s)
      K. Okamoto, T. Tanaka, W. Fujita, K. Awaga, T. Inabe
    • Journal Title

      Phys. Rev. B 76

    • Related Report
      2008 Final Research Report
  • [Journal Article] Magnetic Properties and Crystal Structure of Solvent-Free Sc@C82 Metallofullerene Microcrystals2007

    • Author(s)
      Y. Ito, W. Fujita, T. Okazaki, T. Sugai, K. Awaga, E. Nishibori, M. Takata, M. Sakata, H. Shinohara
    • Journal Title

      ChemPhysChem 8

      Pages: 1019-24

    • Related Report
      2008 Final Research Report
  • [Journal Article] Pressure effect on spin-Peierls-like transition in quasi-1D spin systems [RBzPy][Ni(mnt)2]2007

    • Author(s)
      X.M. Ren, S. Nishihara, T. Akutagawa, S. Noro, T. Nakamura, W. Fujita, K. Awaga
    • Journal Title

      Chem. Phys. Lett. 439

      Pages: 318-22

    • Related Report
      2008 Final Research Report
  • [Journal Article] Spin, charge and lattice correlation in thiazyl radicals and their molecular compounds2007

    • Author(s)
      K. Awaga, T. Tanaka, T. Shirai, Y. Umezono, W. Fujita
    • Journal Title

      Comp. Rend. Chim. 10

      Pages: 52-59

    • Related Report
      2008 Final Research Report
  • [Journal Article] Charge ordering and nonlinear electrical transport in quasi-1D organic chains with strong electrostatic interchain interactions2007

    • Author(s)
      K. Okamoto, T. Tanaka, W. Fujita, K. Awaga, and T. Inabe
    • Journal Title

      Physical Review B 76

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic properties and crystal structure of solvent-free Sc@C82 metallofullerene microcrystals.2007

    • Author(s)
      Y. Ito, W. Fujita, T. Okazaki, T. Sugai, K. Awaga, E. Nishibori, M. Takata, M. Sakata, and H. Shinohara
    • Journal Title

      Chem Phys Chem 8

      Pages: 1019-1024

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spin, charge and lattice correlation in thiazyl radicals and their molecular compounds.2007

    • Author(s)
      K. Awaga, T. Tanaka, T. Shirai, Y. Umezono, and W. Fujita
    • Journal Title

      Comp. Rend. Chim. 10

      Pages: 52-59

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] 二次元正方格子磁性体BBDTA・AuBr_4における磁気相転移2009

    • Author(s)
      藤田渉, 笹森幸太, 菊地耕一, 高橋正
    • Organizer
      日本化学会第89春季年会
    • Place of Presentation
      船橋
    • Related Report
      2008 Final Research Report
  • [Presentation] 有機磁性分子が形成する二次元正方格子ネットワークにおける磁気相転移2009

    • Author(s)
      藤田渉, 笹森幸太, 菊地耕一, 高橋正
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      東京
    • Related Report
      2008 Final Research Report
  • [Presentation] 環状チアジルラジカル結晶の磁気的性質2008

    • Author(s)
      藤田渉、菊地耕一
    • Organizer
      有機典型元素化学討論会
    • Place of Presentation
      八王子
    • Related Report
      2008 Final Research Report
  • [Presentation] Synthesis, structure and property of transition metal complexes of[1,2,5]thiadiazolo[3,4-f][1,10]phenanth roline ligand2008

    • Author(s)
      Yoshiaki Shuku, Wataru Fujita, Kunio Awaga, Osamu Sato
    • Organizer
      IRTG(MS-NG) The 6th joint seminar University of Muenster-Nagoya University
    • Place of Presentation
      名古屋
    • Related Report
      2008 Final Research Report
  • [Presentation] β-(BDA-TTP)_2X(X=I_3,IBr_2)の超伝導臨界圧力の圧力印加方向依存性2008

    • Author(s)
      小島正幸・磯野貴之・兒玉健・藤田渉・菊地耕一・改發敬之・圷広樹・山田順一
    • Organizer
      第2回分子科学討論会
    • Place of Presentation
      福岡
    • Related Report
      2008 Final Research Report
  • [Presentation] 金ハロゲン化物アニオンを有する有機カチオンラジカル塩の結晶構造と磁気的性質2008

    • Author(s)
      藤田渉、菊地耕一
    • Organizer
      第2回分子科学会
    • Place of Presentation
      福岡
    • Related Report
      2008 Final Research Report
  • [Presentation] 有機磁性分子カチオン-金ハロゲン化物アニオン塩結晶の構造と磁気的性質2008

    • Author(s)
      藤田渉, 菊地耕一
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      盛岡
    • Related Report
      2008 Final Research Report
  • [Presentation] Synthesis, structure and property of first-row transition metal complexes of [1,2,5]thiadiazolo[3,4-f][1,10]phenanth roline ligand2008

    • Author(s)
      Yoshiaki Shuku, Wataru Fujita, Kunio Awaga, Osamu Sato
    • Organizer
      The 11th International Conference on Molecule-based Magnets (ICMM2008)
    • Place of Presentation
      Florence, Italy
    • Related Report
      2008 Final Research Report
  • [Presentation] A Structural Study on the Spin-Gap Formation Processes in Organic Radical Crystals2008

    • Author(s)
      Wataru Fujita, Koichi Kikuchi
    • Organizer
      IUCr2008 Satellite Meeting 'Molecular Crystals Exhibiting Exotic Functions'
    • Place of Presentation
      大阪
    • Related Report
      2008 Final Research Report
  • [Presentation] チアジアゾール環を有する1,10-フェナントロリン誘導体を配位子にもつ錯体の合成とその物性2008

    • Author(s)
      珠玖良昭、藤田渉、阿波賀邦夫、佐藤治
    • Organizer
      日本化学会第88春季年会
    • Place of Presentation
      東京
    • Related Report
      2008 Final Research Report
  • [Presentation] 伝導電子と局在スピンを併せ持つ[NT]_3[GaCl_4]_<1-x>[FeCl_4]_xの非線形伝導とEPR2008

    • Author(s)
      野村賢司、岡本健太郎、藤田渉、阿波賀邦夫、稲辺保
    • Organizer
      日本化学会第88春季年会
    • Place of Presentation
      東京
    • Related Report
      2008 Final Research Report
  • [Presentation] チアジアゾール環を有するフェナントロリンを配位子とした錯体の合成とその物性測定2008

    • Author(s)
      珠玖良昭、藤田渉、阿波賀邦夫、佐藤治
    • Organizer
      物質合成研究機関連携事業第3回物質合成シンポジウム
    • Place of Presentation
      福岡
    • Related Report
      2008 Final Research Report
  • [Presentation] Chemical Bonds Formed in Organic Radical Crystals2008

    • Author(s)
      Wataru Fujita
    • Organizer
      TMU/SNU Joint Seminar on Nano-Science and Related Topics
    • Place of Presentation
      八王子
    • Related Report
      2008 Final Research Report
  • [Presentation] 有機磁性固体中に見られるラジカルカップリング反応2007

    • Author(s)
      藤田 渉
    • Organizer
      有機結晶シンポジウム
    • Place of Presentation
      千葉大学
    • Year and Date
      2007-09-08
    • Related Report
      2007 Annual Research Report
  • [Presentation] 有機磁性分子結晶が示すラジカルカップリング反応2007

    • Author(s)
      藤田渉
    • Organizer
      分子研研究会・先端的ESR手法による分子性物質の新機能性探索
    • Place of Presentation
      岡崎
    • Related Report
      2008 Final Research Report
  • [Presentation] 有機磁性固体中に見られるラジカルカップリング反応2007

    • Author(s)
      藤田渉
    • Organizer
      第16回有機結晶シンポジウム
    • Place of Presentation
      千葉
    • Related Report
      2008 Final Research Report
  • [Presentation] 一次元配位高分子磁性錯体BBDTA・InCl_4の低温結晶構造2007

    • Author(s)
      池田光晴・笹森幸太・兒玉健・藤田渉・菊地耕一
    • Organizer
      日本物理学会2007年秋季大会
    • Place of Presentation
      札幌
    • Related Report
      2008 Final Research Report
  • [Presentation] 局在スピンと伝導電子が共存する[NT]_3[GaCl_4]_<1-x>[FeCl_4]_xの非線形伝導と磁気的基底状態2007

    • Author(s)
      野村賢司・岡本健太郎・藤田渉・阿波賀邦夫・稲辺保
    • Organizer
      第1回分子科学討論会
    • Place of Presentation
      仙台
    • Related Report
      2008 Final Research Report

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Published: 2007-04-01   Modified: 2016-04-21  

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