Dimensionalty control of magnetic structure for the organic-inorganic hybrid system building on oxalate complexes

2008 Fiscal Year Final Research Report

• Project/Area Number: 19750105
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Functional materials chemistry
• Research Institution: The University of Tokyo
• Principal Investigator: ENOMOTO Masaya The University of Tokyo, 大学院・総合文化研究科, 助教 (70345065)
• Co-Investigator(Renkei-kenkyūsha): KOJIMA Norimichi 東京大学, 大学院総合文化研究科, 教授 (60149656)
• Project Period (FY): 2007 – 2008
• Keywords: 強磁性 / 分子性固体 / 電荷移動相転移 / 比熱 / 次元性 / 誘電応答 / 有機・無機複合錯体 / 希釈磁性

Research Abstract

電荷移動により磁性を変化させる[Fe^<II>Fe^<III>(dto)_3]系遷移金属錯体の磁気構造解明のため、磁気構造の次元性を制御する目的で磁性サイトの非磁性置換体(n-C_3H_7)_4N[Fe^<II>_<1-x>Zn^<II>_xFe^<III>(dto)_3]をx=0-1の範囲で連続的に合成し、その磁性を調べた。その結果、低濃度置換で電荷移動が抑制され、さらに高濃度置換で磁気相互作用が強磁性的相互作用から反強磁性的相互作用へ変化することが明らかとなった。

Research Products

• [Journal Article] Magnetic Dilution Effect on the Charge Transfer Phase Transition and the Ferromagnetic Transition for an Iron Mixed-Valence Complex, (n-C_3H_7)_4N[Fe^<II>_<1-x>Zn^<II>_xFe^<III> (dto)_3] (dto = C_2O_2S_2) (2009)
  • Author(s): M. Enomoto, N. Kojima
  • Journal Title: Polyhedron (in press)
  • Peer Reviewed
• [Journal Article] Mossbauer Spectroscopic Study of Photo-Sensitive Organic-Inorganic Hybrid System, (SP)[Fe(II)Fe(III)(dto)_3] (dto = C_2O_2S_2 SP = spiropyran) (2009)
  • Author(s): N. Kida, M. Hikita, I. Kashima, M, Enomoto, M. Itoi, N. Kojima
  • Journal Title: Polyhedron (in press)
  • Peer Reviewed
• [Journal Article] Study on the valence fluctuation and the magnetism of an iron mixed-valence complex, (n-C_4H_9)_4N [Fe^<II>Fe^<III>(mto)_3] (mto = C_2O_3S) (2009)
  • Author(s): K. Kagesawa, Y. Ono, M. Enomoto, N. Kojima
  • Journal Title: Polyhedron (in press)
  • Peer Reviewed
• [Journal Article] Control of Charge Transfer Phase Transition and Ferromagnetism by Photoisomerization of Spiropyran for an Organic-Inorganic Hybrid System, (SP)[Fe^<II>Fe^<III>(dto)_3] (SP = spiropyran, dto = C_2O_2S_2) (2009)
  • Author(s): N. Kida, M. Hikita, I. Kashima, M. Okubo, M. Itoi, M. Enomoto, K. Kato, M. Takata, N. Kojima
  • Journal Title: J. Am. Chem. Soc. 131 Pages: 212-220
  • Peer Reviewed
• [Journal Article] Spin Dynamics of the Ferromagnetic Transition in Iron Mixed-Valence Complexes, (n-C_nH_<2n+1>)_4N [Fe^<II>Fe^<III>(dto)_3] (dto = C_2O_2S_2, n = 3-5) by μSR (2008)
  • Author(s): M. Enomoto, N. Kida, I. Watanabe, T. Suzuki, N. Kojima
  • Journal Title: Physica. B. 404 Pages: 642-644
  • Peer Reviewed
• [Journal Article] Spin dynamics of the charge-transfer phase transition of an iron mixed-valence complex observed using muon spin relaxation spectroscopy (2008)
  • Author(s): N. Kida, M. Enomoto, I. Watanabe, T. Suzuki, N. Kojima
  • Journal Title: Phys. Rev. B 77 Pages: 144427-1-5
  • Peer Reviewed
• [Presentation] 有機無機複合錯体(SP)[Fe^<II>Fe^<III>(dto)_3](SP=spiropyran, dto = C_2O_2S_2)におけるSPの光異性化による電荷移動相転移と強磁性の制御 (2009)
  • Author(s): 木田紀行, 榎本真哉, 小島憲道
  • Organizer: 日本化学会年会
  • Place of Presentation: 日本大学(船橋(千葉))
  • Year and Date: 2009-03-28
• [Presentation] 鉄混合原子価錯体(n-C_nH_<2n+1>)_4N[Fe^<II>Fe^<III>(C_2O_3S)_3]における磁性と電荷遥動に関する研究 (2009)
  • Author(s): 影澤幸一, 小野祐樹, 榎本真哉, 小島憲道
  • Organizer: 日本化学会年会
  • Place of Presentation: 日本大学(船橋(千葉))
  • Year and Date: 2009-03-28
• [Presentation] 光応答性配位子を用いた鉄錯体[Fe(SPphen)_3](B(C_6H_5)_4)_2におけるスピン状態の研究 (2009)
  • Author(s): 菅原哲, 清水秀治, 榎本真哉, 小島憲道
  • Organizer: 日本化学会年会
  • Place of Presentation: 日本大学(船橋(千葉))
  • Year and Date: 2009-03-28
• [Presentation] 鉄混合原子価錯体[Fe^<II>_<1-x>Zn^<II>_xFe^<III>(dto)_3]の磁性と電荷移動に対する非磁性元素 (2009)
  • Author(s): 榎本真哉, 小島憲道
  • Organizer: 日本化学会年会
  • Place of Presentation: 日本大学(船橋(千葉))
  • Year and Date: 2009-03-27
• [Presentation] Magnetic Dilution Effect on the Charge Transfer Phase Transition and the Ferromagnetic Transition for an Iron Mixed-Valence Complex, (n-C_3H_7)_4N[Fe^<II>_<1-x>Zn^<II>_xFe^<III>(dto)_3] (dto = C_2O_2S_2) (2008)
  • Author(s): M. Enomoto, N. Kojima
  • Organizer: International Coference on Molecule-based Magnet 2008
  • Place of Presentation: Convitto della Calza (Florence (Italy))
  • Year and Date: 2008-09-23
• [Presentation] Mossbauer Spectroscopic Study of Photo-Sensitive Organic-Inorganic Hybrid System, (SP)[Fe(II)Fe(III)(dto)_3] (dto = C_2O_2S_2 SP = spiropyran) (2008)
  • Author(s): N. Kida, M. Hikita, I. Kashima, M, Enomoto, M. Itoi, N. Kojima
  • Organizer: International Coference on Molecule-based Magnet 2008
  • Place of Presentation: Convitto della Calza (Florence (Italy))
  • Year and Date: 2008-09-23
• [Presentation] Study on the valence fluctuation and the magnetism of an iron mixed-valence complex, (n-C_4H_9)_4N [Fe(II)Fe(III)(mto)_3] (mto = C_2O_3S) (2008)
  • Author(s): K. Kagesawa, Y. Ono, M. Enomoto, N. Kojima
  • Organizer: International Coference on Molecule-based Magnet 2008
  • Place of Presentation: Convitto della Calza (Florence (Italy))
  • Year and Date: 2008-09-23
• [Presentation] Spin Dynamics of the Ferromagnetic Transition in Iron Mixed-Valence Complexes, (n-C_nH_<2n+1>)_4N [Fe(II)Fe(III)(dto)_3] (dto = C_2O_2S_2, n = 3-5) by μSR (2008)
  • Author(s): M. Enomoto. N. Kida, I. Watanabe, T. Suzuki, N. Kojima
  • Organizer: μSR 2008
  • Place of Presentation: Tsukuba International Congress Center (Tsukuba(Japan))
  • Year and Date: 2008-07-21
• [Presentation] Dynamic Process of Charge Transfer Phase Transition in Iron Mixed Valence Complex, (C_nH_<2n+1>)_4N[Fe(II)Fe(III)(dto)_3] (n = 3-5; dto = C_2O_2S_2) (2007)
  • Author(s): M. Enomoto. N. Kida, I. Watanabe, T. Suzuki, N. Kojima
  • Organizer: International Symposium on Chemistry of Coordination Space
  • Place of Presentation: Awaji Yumebutai International Conference Center (Awaji (Japan))
  • Year and Date: 2007-12-10
• [Presentation] Dielectric Constant behavior under charge transfer phase transition in the series of [Fe^<II>Fe^<III>(dto)_3] complexes (2007)
  • Author(s): M. Enomoto, N. Kojima
  • Organizer: 7th International Symposium on Crystalline Organic Metals Superconductors and Ferromagnets
  • Place of Presentation: Congress Palace (Peniscola (Spain))
  • Year and Date: 2007-09-25