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Study on Correlation between Magnetism and Electrical Conductivity in Electro-oxidized Actinide Phthalocyanine Complexes

Research Project

Project/Area Number 21K14644
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 34010:Inorganic/coordination chemistry-related
Research InstitutionJapan Atomic Energy Agency (2022-2023)
Kyoto University (2021)

Principal Investigator

Tabata Chihiro  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 物質科学研究センター, 研究職 (60783496)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywordsアクチノイド / フタロシアニン / 結晶構造解析 / 磁性 / 第一原理計算 / ウラン化合物 / 5f電子磁性 / 層状化合物 / ウラン磁性体 / 構造解析 / 帯磁率 / 錯体
Outline of Research at the Start

フタロシアニン分子は非常に多種の金属と錯体を形成し、中心金属の性質を色濃く反映した多彩な物性(磁性、電気伝導性など)を示す。3d遷移金属元素や4f希土類元素のフタロシアニン錯体について数多くの研究が行われてきた一方、5f電子を有するアクチノイド元素のフタロシアニン錯体の研究例は非常に少ない。本研究では、アクチノイドフタロシアニン錯体における5f電子磁性と伝導性の相関現象を探索することを目的とし、電解酸化によって異なるカウンターアニオンを導入することで電子状態を変化させたアクチノイドフタロシアニン錯体について、微視的な電子状態の視点に基づいて熱力学特性、輸送特性を評価する。

Outline of Final Research Achievements

The neutral and cationic species of the tetravalent uranium phthalocyanine complex UPc2, which is one of the uranium phthalocyanine complexes with a sandwich structure, were synthesised, their crystal structures were determined and the magnetic properties of the uranium ion as the central metal were clarified. The crystal structure of [UPc2][BF4], the cationic species of which has not been synthesised before, was determined for the first time, and a crystal field analysis of the measured magnetosensitivity of the neutral species revealed that it exhibits Curie paramagnetism down to low temperatures, which is derived from the pseudo-degenerate two levels. Furthermore, structural optimisation based on first-principles calculations suggested a highly curved structure in the cationic species from the molecular structure determined from X-ray structural analysis, indicating the existence of strong packing effects during crystallisation.

Academic Significance and Societal Importance of the Research Achievements

フタロシアニン錯体に限らず、放射性物質の取扱の困難さからアクチノイド系化合物の研究例は少なく、継続的に研究を行っているグループは限られている。一方で、アクチノイド化合物の構造および磁性等の物性を支配する5f電子は、遷移金属のd電子や希土類金属の4f電子とは異なる独特かつ多彩な性質を示す。本研究では、物性物理学分野が得意とする詳細な物理量測定に基づく電子物性研究の手法と、物性化学分野が得意とする緻密で多彩な物質開発手法を組み合わせることで、錯体中の5f電子が示す磁性とその結晶構造を精密に解析・解明することに成功した。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (14 results)

All 2024 2023 2022 2021

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 3 results)

  • [Journal Article] Polarized Neutron Diffraction Study on UPt2Si22024

    • Author(s)
      F. Kon, C. Tabata, H. Saito, T. Nakajima, H. Hidaka, T. Yanagisawa, and H. Amitsuka
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 93 Issue: 4

    • DOI

      10.7566/jpsj.93.044701

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Magnetic order in honeycomb layered U2Pt6Ga15 studied by resonant x-ray and neutron scattering2024

    • Author(s)
      Chihiro Tabata, Fusako Kon, Kyugo Ota, Ruo Hibino, Yuji Matsumoto, Hiroshi Amitsuka, Hironori Nakao, Yoshinori Haga and Koji Kaneko
    • Journal Title

      Phys. Rev. B

      Volume: 109 Issue: 13 Pages: 134403-134403

    • DOI

      10.1103/physrevb.109.134403

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Correlation between antiferromagnetic and charge-density-wave order in UPt2Si2 studied by resonant X-Ray scattering2023

    • Author(s)
      Kon Fusako、Tabata Chihiro、Miura Kodai、Hibino Ruo、Hidaka Hiroyuki、Yanagisawa Tatsuya、Nakao Hironori、Amitsuka Hiroshi
    • Journal Title

      SciPost Physics Proceedings

      Volume: 11 Issue: 11

    • DOI

      10.21468/scipostphysproc.11.011

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Incommensurate Nature of the Antiferromagnetic Order in GdCu22023

    • Author(s)
      K.Kaneko, C. Tabata, M. Hagihala, H. Yamauchi, M. Kubota, T. Osakabe, Y. Onuki
    • Journal Title

      JPSJ

      Volume: 92 Issue: 8 Pages: 085001-085001

    • DOI

      10.7566/jpsj.92.085001

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Crystallographic and/or magnetic properties of neutral and cationic uranium(IV) sandwiched phthalocyanine complexes2023

    • Author(s)
      C. Tabata, H. Watanabe, K. Shirasaki, A. Sunaga, T. Fukuda, D. Li, and T. Yamamura
    • Journal Title

      J. Mol. Struct.

      Volume: 1277

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Neutron Scattering Study of Antiferromagnet U2Pt6Al152023

    • Author(s)
      Kyugo Ota, Yuji Matsumoto,Yuki Watabe, Koji Kaneko, Chihiro Tabata, Yoshinori Haga
    • Journal Title

      New Physics: Sae Mulli,

      Volume: 73 Issue: 12 Pages: 1170-1173

    • DOI

      10.3938/npsm.73.1170

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Crystallographic and/or magnetic properties of neutral and cationic uranium(IV) sandwiched phthalocyanine complexes2023

    • Author(s)
      Tabata Chihiro、Watanabe Hirohito、Shirasaki Kenji、Sunaga Ayaki、Fukuda Takamitsu、Li Dexin、Yamamura Tomoo
    • Journal Title

      Journal of Molecular Structure

      Volume: 1277 Pages: 134870-134870

    • DOI

      10.1016/j.molstruc.2022.134870

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Microscopic study of interplay between charge-density-wave and antiferromagnetic orders in UPt2Si22023

    • Author(s)
      F. Kon, C. Tabata, K. Miura, R. Hibino, H. Hidaka, T. Yanagisawa, H. Nakao, and H. Amitsuka
    • Organizer
      International Conference on Strongly Correlated Electron Systems (SCES) 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Resonant X-ray Scattering Study of the Nonmagnetic Order of 5f Electrons in a Pseudo-Kagome Layered System URhSn2023

    • Author(s)
      C. Tabata, F. Kon, H. Amitsuka, Y. Shimizu, Y. Homma, D. Aoki, and H. Nakao
    • Organizer
      International Conference on Strongly Correlated Electron Systems (SCES) 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ハニカム層状化合物 U2Pt6Ga15の磁気秩序2023

    • Author(s)
      田端千紘, 金子耕士 , 芳賀芳範 , 今布咲子, 日比野瑠央, 太田玖吾, 松本裕司, 網塚浩, 中尾裕則
    • Organizer
      日本中性子科学会第23回年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 放射光・中性子の相補利用によるアシンメトリ量子の観測2023

    • Author(s)
      田端千紘
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Magnetic Order in Honeycomb Layered U2Pt6Ga15 Studied by Resonant X-ray Scattering2022

    • Author(s)
      Chihiro Tabata
    • Organizer
      29th International Conference on Low Temperature Physics (LT29)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Resonant X-ray Scattering Study of 5f-electrons in uranium intermetallics2022

    • Author(s)
      Chihiro Tabata
    • Organizer
      International workshop on Microscopic Properties of Quantum Materials
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ウランフタロシアニン錯体の結晶構造と磁性2021

    • Author(s)
      田端千紘
    • Organizer
      大洗・アルファ合同研究会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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