• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of Rare-Earth Radical Frameworks (RERF) and Functional Magnets

Research Project

Project/Area Number 20K21170
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 32:Physical chemistry, functional solid state chemistry, and related fields
Research InstitutionThe University of Electro-Communications

Principal Investigator

Ishida Takayuki  電気通信大学, 大学院情報理工学研究科, 教授 (00232306)

Co-Investigator(Kenkyū-buntansha) 畑中 信一  電気通信大学, 大学院情報理工学研究科, 助教 (40334578)
Project Period (FY) 2020-07-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords有機ラジカル / 希土類イオン / 磁性材料 / 分子磁性 / ラジカル / ランタノイド / ニトロキシド
Outline of Research at the Start

我々は希土類-有機ラジカルヘテロスピン分子で最強の磁気結合系を開発した。本研究ではそのような知見を高次元配位高分子の磁性体“RERF”(希土類-ラジカルフレームワーク)へ適用する。
RERFは全く斬新な概念である。なぜならラジカルの合成自体に高い有機合成の技能が要求され、また、一般的にはラジカルの環境耐性に問題が予想されていたからである。準備研究段階ではこの2点を克服している。
高性能磁石を高トルクモーターに応用すれば電力エネルギー問題解決に寄与する。室温稼働の磁気冷凍器に使えばフロンガスの無い社会を実現する。高性能磁石は社会的波及効果が高い。

Outline of Final Research Achievements

We applied the science and technology of SMM physics and chemistry to polymeric rare-earth radical frameworks involving 2p-4f-heterospins. Before this project, there has been a grave problem: biradical compounds are highly reactive and deteriorated during the complexation reactions. In the present work, we found that biradicals having sterically bulky substituents like 2,4,6-triisopropylphenyl, tert-butyl, and bis(trifluoromethyl) groups are persistent during the complexation reactions, thus affording several 2p-4f hybrid oligomeric and polymeric magnets. The sample involving Tb(3+) displayed a magnetic hysteresis curve. Though these compounds are not three-dimensional, the present result can be regarded as a successful development of 2p-4f heterospin polymeric magnets.

Academic Significance and Societal Importance of the Research Achievements

室温においても三重項分子としてふるまうビスニトロキシドを架橋配位子として用いた磁石を開発した。有機骨格部分はさまざまな構造上のチューニングが可能であるから、従来の無機材料磁石には思いもよらない性能や利用価値が生まれる。単分子磁石はそのうちの一つであり、高密度記録材料としての利用が検討されている。今回、有機無機ハイブリッドの無限ポリマー状錯体として2例を実際に得ることができ、そのうちTbイオンのものが磁気ヒステリシスを描いた。将来的には、高性能磁石は高トルクモーターに使えばエネルギー問題を解決し、磁気冷凍機に使えば脱フロン脱冷媒の社会を構築するなどの社会的意義がある。

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (27 results)

All 2022 2021 2020 Other

All Int'l Joint Research (5 results) Journal Article (11 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 11 results,  Open Access: 8 results) Presentation (10 results) (of which Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] University of Calcutta(インド)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Massey University(ニュージーランド)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Cukurova University(トルコ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Universite Paris-Saclay/Institut Polytechnique de Paris(フランス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Universitas Negeri Malang/Universitas Brawijaya(インドネシア)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Self-Assembly of Non-Macrocyclic Triangular Ni3Ln Clusters2022

    • Author(s)
      T. N. Dais, R. Takano, T. Ishida, and P. G. Plieger
    • Journal Title

      Dalton Transactions

      Volume: 51 Issue: 4 Pages: 1446-1453

    • DOI

      10.1039/d1dt03742k

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Metallocyclic CuII-LnIII Single-Molecule Magnets from the Self-Assembly of 1,4-Diformylnaphthalene-2,3-diol2022

    • Author(s)
      T. N. Dais, R. Takano, Y. Yamaguchi, T. Ishida, and P. G. Plieger
    • Journal Title

      ACS Omega

      Volume: 7 Issue: 6 Pages: 5537-5546

    • DOI

      10.1021/acsomega.1c07001

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Lanthanide Induced Variability in Localised CoII Geometries of Four Triangular L3Co3IILnIII Complexes2022

    • Author(s)
      T. N. Dais, R. Takano, T. Ishida, and P. G. Plieger
    • Journal Title

      RSC Advances

      Volume: 12 Issue: 8 Pages: 4828-4835

    • DOI

      10.1039/d1ra08797e

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] [Tb4(OH)4]-Cuboid Complex Dianion Stabilized with Six Carboxylate Bridges and Four Diketonate Caps2022

    • Author(s)
      Y. Yamaguchi and T. Ishida
    • Journal Title

      Crystals

      Volume: 12 Issue: 3 Pages: 402-402

    • DOI

      10.3390/cryst12030402

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pincer-type Bisnitroxide Radicals Involving Tetramethylenedioxy and o-Xylylenedioxy Bridges2022

    • Author(s)
      Y. Yamaguchi, R. Takano, and T. Ishida
    • Journal Title

      Tetrahedron Letters

      Volume: 97 Pages: 153841-153841

    • DOI

      10.1016/j.tetlet.2022.153841

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Polymeric Terbium(III) Squarate Hydrate as a Luminescent Magnet2021

    • Author(s)
      R. Takano and T. Ishida
    • Journal Title

      Crystals

      Volume: 11 Issue: 10 Pages: 1221-1221

    • DOI

      10.3390/cryst11101221

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Strong Antiferromagnetic Interaction in a Gadolinium(III) Complex with Methoxy-TEMPO Radical: A Relation between the Coupling and the Gd-O-N Angle2021

    • Author(s)
      T. Nakamura, T. Kanetomo, T. Ishida
    • Journal Title

      Inorganic Chemistry

      Volume: 60 Issue: 2 Pages: 535-539

    • DOI

      10.1021/acs.inorgchem.0c02568

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Molecular S = 2 High-Spin, S = 0 Low-Spin and S = 0 <--> 2 Spin-Transition/-Crossover Nickel(II)-Bis(nitroxide) Coordination Compounds2021

    • Author(s)
      T. Ishida, S. Ito, Y. Homma, Y. Kyoden
    • Journal Title

      Inorganics

      Volume: 9 Issue: 2 Pages: 10-10

    • DOI

      10.3390/inorganics9020010

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Hidden Coordination-Bond Torsional Deformation as a Sign of Possible Spin Transition in Nickel(II)-Bis(nitroxide) Compounds2020

    • Author(s)
      Y. Kyoden, T. Ishida
    • Journal Title

      Molecules

      Volume: 25 Issue: 17 Pages: 3790-3790

    • DOI

      10.3390/molecules25173790

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Modulating the Ground State, Stability and Charge Transport in OFETs of Biradicaloid Hexahydro-diindenopyrene Derivatives and a Proposed Method to Estimate the Biradical Character2020

    • Author(s)
      T. Jousselin-Oba, M. Mamada, A. Okazawa, J. Marrot, T. Ishida, C. Adachi, A. Yassar, M. Frigoli
    • Journal Title

      Chemical Science

      Volume: 11 Issue: 44 Pages: 12194-12205

    • DOI

      10.1039/d0sc04583g

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effects of ZnO Nanoparticles on the Antifungal Performance of Fe3O4/ZnO Nanocomposites Prepared from Natural Sand2020

    • Author(s)
      A. Taufiq, H. N. Ulya, C. I. Yogihati, Sunaryono, N. Hidayat, N. Mufti, Masruroh, S. Soda, T. Ishida
    • Journal Title

      Advances in Natural Sciences: Nanoscience and Nanotechnology

      Volume: 11 Issue: 4 Pages: 045004-045004

    • DOI

      10.1088/2043-6254/abb8c6

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 三重項配位子を含む希土類マクロサイクルLn2L2の構造と磁気的性質2022

    • Author(s)
      伊藤沙紀・吉武 徹・石田尚行
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 四角酸を用いた二層ポリマー構造を有する希土類錯体の磁気的性質2022

    • Author(s)
      高野莉奈・石田尚行
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 基底三重項配位子が架橋したLn/L比2/2の環状錯体の磁気的性質2021

    • Author(s)
      伊藤沙紀、吉武 徹、石田尚行
    • Organizer
      錯体化学会第71回討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ジイミン系配位子のもたらす結晶場と鉄(II)スピンクロスオーバー転移温度の関係2021

    • Author(s)
      高野莉奈、石田尚行
    • Organizer
      錯体化学会第71回討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 4f-2pヘテロスピン系ナノ磁石とその関連材料科学2021

    • Author(s)
      石田尚行
    • Organizer
      新化学技術推進協会(JACI) 先端化学・材料技術部会講演会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] ビスニトロキシドラジカルを用いた希土類錯体の磁気的性質2021

    • Author(s)
      伊藤沙紀, 石田尚行
    • Organizer
      日本化学会第101春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 温度依存するニトロキシドビラジカルのコンホメーションに関する研究2021

    • Author(s)
      山口慶来, 石田尚行
    • Organizer
      日本化学会第101春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 二核鉄(II)ヘリケートのスピンクロスオーバーと配位子の誘導体化の研究2021

    • Author(s)
      高野莉奈, 石田尚行
    • Organizer
      日本化学会第101春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] ソフトクリスタルを志向した嵩高い置換基を有するアントラセン誘導体の合成と結晶構造、蛍光特性の評価2021

    • Author(s)
      納田菜摘、松橋千尋、石田尚行、牧昌次郎、平野 誉
    • Organizer
      日本化学会第101春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 希土類イオンを使った分子性磁性材料2020

    • Author(s)
      石田尚行
    • Organizer
      近畿化学協会エレクトロニクス部会研究会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Remarks] 電通大・石田研

    • URL

      http://ttf.pc.uec.ac.jp/achi.html

    • Related Report
      2021 Annual Research Report 2020 Research-status Report

URL: 

Published: 2020-08-03   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi