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配位空間制御による点・線・空間の磁気相関発達の系統的研究

Research Project

Project/Area Number 18033042
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionTohoku University

Principal Investigator

宮坂 等  Tohoku University, 大学院・理学研究科, 准教授 (50332937)

Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2007: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2006: ¥1,900,000 (Direct Cost: ¥1,900,000)
Keywords配位空間 / 単一次元鎖磁石 / 単分子磁石 / 磁気相関 / 次元制御
Research Abstract

「Single-Molecule Magnet (SMM)を交換相互作用で一次元に連結するとSingle-Chain Magnet (SCM)ができる」という本研究者が提唱した極めて単純な方法論を基に、SMMとなるMn(III)二核錯体、それを水素結合の弱い相互作用で一次元化した化合物、反磁性金属で連結した反強磁性SCMを合理的に合成し、極めて弱い摂動としての鎖内相互作用から相関に至る過程での磁化緩和ダイナミクスを追跡することに成功した。また、SMMとなる[Mn^<III>-M^<II>-Mn^<III>](M^<II>=Ni^<II>,S_T=3;Cu^<II>,S_T=7/2)を設計し、これらSMMを強磁性相互作用により一次元に連結することにより、一次元相関(regular chain又はdimerized chain)に依存した磁化緩和を理論的に説明することに成功した。これらの例は、鎖内相互作用(又は相関)のSCM挙動への影響を系統的に示した例である。空間としての一次元鎖は、鎖間相互作用として影響を受けるはずである。その相互作用が強く、鎖間相関を作る場合は、バルク磁石挙動を示す。実際に、同様な構造の一次元鎖で、鎖間環境を変えることでバルク磁石とSCMの作り分けにも成功している。しかし、実は、鎖内相関が鎖間相関よりも十分に大きい場合には、三次元的な長距離秩序を起こした後でも鎖内の磁化反転は起こりうることがわかってきた。

Report

(2 results)
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (30 results)

All 2007 2006

All Journal Article (24 results) (of which Peer Reviewed: 13 results) Presentation (5 results) Book (1 results)

  • [Journal Article] Two-Dimensional Coordination Networks of [Mn_4] Single-Molecule Magnets: Heat Capacity Measurements2007

    • Author(s)
      Tatsuya Fujisaki, et. al.
    • Journal Title

      J. Phys. Son. Jpn. 76

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of an applied magnetic field on the relaxation time of single-chain magnets2007

    • Author(s)
      Claude Coulon, et. al.
    • Journal Title

      Phys. Rev. B 76

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hybrid Molecular Material Exhibiting Single-Molecule Magnet Behavior and Molecular Conductivity2007

    • Author(s)
      Hiroki Hiraga, et. al.
    • Journal Title

      Inorg. Chem. 46

      Pages: 9661-9671

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Why Does the Disorder of R-pn and rac-pn Ligands in the Quasi-One-Dimensional Bromo-Bridged Ni^<III> Complexes, [Ni(pan)_2Br]Br_2 (pn=1,2-diaminopropane) Afford Similar STM Patterns?2007

    • Author(s)
      Hashen Wu, et. al.
    • Journal Title

      Inorg. Chem. 46

      Pages: 7410-7413

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Metal-Insulator Transition of Charge-Transfer Salts Based on Unsymmetrical Donor DMET and Metal Halide Anions (DMET)_4(MCI_4)(TCE)_2(M=Mn, Co, Cu, Zn; TCE=1, 1, 2,-trichloroethane)2007

    • Author(s)
      Hiroshi Ito, et. al.
    • Journal Title

      J. Am. Chem. Soc. 129

      Pages: 8510-8518

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Single-Molecule Magnet Behavior in Heterometallic M^<II>-Mn^<III>_2-M^<II> Tetramers (M^<II>=Cu, Ni) Containing Mn^<III> Salen-Type Dinuclear Core2007

    • Author(s)
      Chihiro Kachi-Terajima, et. al.
    • Journal Title

      Inorg. Chem. 46

      Pages: 5861-5872

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pressure effects on Mn_4 single-molecule magnet with two-dimensional correlation2007

    • Author(s)
      M. Ogawa, et. al.
    • Journal Title

      J. Mag. Mag. Mater. 310

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Unusual regioselective mercuration of metalloporphyrins and its potential applications2007

    • Author(s)
      Ken-ichi Sugiura, et. al.
    • Journal Title

      Chem. Commun.

      Pages: 2046-2047

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Direct evidence of exchange interaction dependence of magnetization relaxation in a family of ferromagnetic-type single-chain magnets2007

    • Author(s)
      Ayumi Saitoh, et. al.
    • Journal Title

      J. Mater. Chem. 17

      Pages: 2002-2012

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] One-Dimensional Supramolecular Organization of Single-Molecule Magnets2007

    • Author(s)
      Lollita Lecren, et. al.
    • Journal Title

      J. Am. Chem. Soc. 129

      Pages: 5045-5051

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tuning of Electronic Structures of Quasi-One-Dimensional Bromo-Bridged Pd^<II>-Pd^<IV> Mixed-Valence Complexes by Substituting Counter Anions2007

    • Author(s)
      Hisamitsu Arakawa, et. al.
    • Journal Title

      Bull. Chem. Soc. Jpn. 80

      Pages: 189-191

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic Assemblies Based on Mn (III) Salen Analogues2007

    • Author(s)
      Hitoshi Miyasaka, et. al.
    • Journal Title

      Coord. Chem. Rev. 251

      Pages: 2622-2664

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A look at molecular nanosized magnets from the aspect of inter-molecular interaction2007

    • Author(s)
      Hitoshi Miyasaka, et. al.
    • Journal Title

      Dalton Trans.

      Pages: 399-406

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Metal-Metal Bonded Diruthenium Unit Axial-Capped by Di-tert-butylphenolate : [Ru_2(O_2CCH_3)_2(t-Busal-R'py)_2] (t-Busal-R'py^2=N-(R'-2-pyridyl)-2-oxy-3,5-di-tert-butylbenzylaminate; R'=H, 4-Me, 5-Me)2006

    • Author(s)
      H.Miyasaka et al.
    • Journal Title

      Bull. Chem. Soc. Jpn. 79

      Pages: 612-620

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Two-Dimensional Networks Based on Mn_4 Complex Linked by Dicyanamide Anion : From Single-Molecule Magnet to Classical Magnet Behavior2006

    • Author(s)
      H.Miyasaka et al.
    • Journal Title

      J. Am. Chem. Soc. 128

      Pages: 3770-3783

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Dynamical Valence Fluctuation at the Charge-Density-Wave Phase Boundary in Iodide-Bridged Pt Compound [Pt(chxn)_2I]I_22006

    • Author(s)
      S.Takaishi et al.
    • Journal Title

      J. Am. Chem. Soc. 128

      Pages: 6420-6425

    • Related Report
      2006 Annual Research Report
  • [Journal Article] From S_T=3 Single-Molecule Magnet to Diamagnetic Ground State Depending on Molecular Packing of Mn^(III) Salen-type Dimers Decorated by N,N'-Dicyano-1,4-naphthoquinonediiminate Radicals2006

    • Author(s)
      C.Kachi-Terajima et al.
    • Journal Title

      Inorg. Chem. 45

      Pages: 4381-4390

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Observation of the Collective Magnetic Excitation in the Single-Chain Magnet2006

    • Author(s)
      Y.Oshima et al.
    • Journal Title

      Phys. Rev. B 73

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Long-Range Ordered Magnet of a Charge-Transfer Ru_2^(4+)/TCNQ Two-Dimensional Network Compound2006

    • Author(s)
      H.Miyasaka et al.
    • Journal Title

      J. Am. Chem. Soc. 128

      Pages: 11358-11359

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Versatile Vapochromic Behavior Accompanied by a Phase Change between Charge-Polarization State and Charge-Density-Wave State in a Quasi-One-Dimensional Iodo-Bridged Dinuclear Platinum Mixed-Valence Compound, [{NH_3(CH_2)_5NH_3}_2][Pt_2(pop)_4I]・4H_2O2006

    • Author(s)
      M.Yamashita et al.
    • Journal Title

      Bull. Chem. Soc. Jpn. 79

      Pages: 1404-1406

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Single-Chain Magnet Behavior in an Alternated One-Dimensional Assembly of Mn^(III) Schiff-Base Complex and TCNQ Radical2006

    • Author(s)
      H.Miyasaka et al.
    • Journal Title

      Chem. Eur. J. 12

      Pages: 7028-7040

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Spin correlation and relaxational dynamics in molecular-based single-chain magnets2006

    • Author(s)
      J.Kishine et al.
    • Journal Title

      Phys. Rev. B 74

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Giant Macrocycles Composed of Thiophene, Acetylene, and Ethylene Building Blocks2006

    • Author(s)
      K.Nakao et al.
    • Journal Title

      J. Am. Chem. Soc. 128

      Pages: 16740-16747

    • Related Report
      2006 Annual Research Report
  • [Journal Article] "Single-Chain Magnets" : Theoritical Approach and Experimental Systems2006

    • Author(s)
      C.Coulon et al.
    • Journal Title

      Structure and Bonding 122

      Pages: 163-206

    • Related Report
      2006 Annual Research Report
  • [Presentation] μSR study on Single-Chain Magnets(依頼講演)2007

    • Author(s)
      宮坂 等
    • Organizer
      Muon Sciences at the RIKEN-RAL Muon Facility 2007
    • Place of Presentation
      和光、理研
    • Related Report
      2007 Annual Research Report
  • [Presentation] ANISOTROPIC ONE-DIMENSIONAL SYSTEMS: THEIR DYNAMICAL BEHAVIOR TUNNED BY INTRA-CHAIN EXCHANGE COUPLINGS(依頼講演)2007

    • Author(s)
      宮坂 等
    • Organizer
      1st Asian Conference on Coordination Chemistry
    • Place of Presentation
      Okazaki, Aichi, Japan
    • Related Report
      2007 Annual Research Report
  • [Presentation] Single-Molecule Magnetを一次元に繋げる: Single-Chain Magnet(依頼講演)2007

    • Author(s)
      宮坂 等
    • Organizer
      理論から探る磁性科学の展望
    • Place of Presentation
      東京、東京大学
    • Related Report
      2007 Annual Research Report
  • [Presentation] 単分子磁石と単一次元鎖磁石における磁化ダイナミクスの鎖内交換相互作用依存性2007

    • Author(s)
      宮坂 等
    • Organizer
      分子科学討論会2007
    • Place of Presentation
      仙台、東北大学
    • Related Report
      2007 Annual Research Report
  • [Presentation] Mn(III)-Ni(II)フェリ磁性単一次元鎖磁石の磁気挙動2007

    • Author(s)
      宮坂 等
    • Organizer
      日本物理学会2007年秋季学会
    • Place of Presentation
      札幌、北海道大学
    • Related Report
      2007 Annual Research Report
  • [Book] 化学フロンティア16 チャンピオンレコードをもつ金属錯体最前線-新しい機能性錯体の構築に向けて 一次元鎖の常識を破る : 単一次元鎖磁石の開発とその理論解釈(21章)(山下正廣・北川 進編)2006

    • Author(s)
      宮坂 等
    • Total Pages
      11
    • Publisher
      化学同人
    • Related Report
      2006 Annual Research Report

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Published: 2006-04-01   Modified: 2018-03-28  

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