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Synthesis of layered compounds based on differences in compressibility

Research Project

Project/Area Number 19K22230
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 36:Inorganic materials chemistry, energy-related chemistry, and related fields
Research InstitutionTokyo Institute of Technology

Principal Investigator

Takafumi Yamamoto  東京工業大学, 科学技術創成研究院, 准教授 (80650639)

Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords高圧 / 圧縮率 / 層状構造 / 複合アニオン / 高圧合成 / オキシカルコゲナイド
Outline of Research at the Start

近年1GPaを超える圧力を使った無機化合物合成が一般的になりつつあるが、どのような化合物がどのような圧力で合成できるのかということに関しては明確な指針がないのが現状である。本研究はイオンの圧縮率(すなわち硬さ・柔らかさ)というパラメータを利用することによって、高圧合成法を使った新しい層状化合物の設計指針を打ち出そうとするものである。そのために、高圧合成を用いた様々な層状物質の合成を行う。またメカニズム解明のためのin-situ実験を行う。

Outline of Final Research Achievements

In recent years, the synthesis of inorganic compounds using pressures above 1 GPa has become common, but there are no clear guidelines as to what kind of compounds can be synthesized at high pressures. In this study, we focused on the parameter of ionic compressibility (i.e., hardness/softness) to clarify the behavior of compounds under high pressure and their stable structures. Specifically, we focused on the softness of pnictides and hydrides compared to oxide ions, and clarified phase transitions and synthesis methods under high pressure in mixed anionic compounds.

Academic Significance and Societal Importance of the Research Achievements

本研究ではヒドリドの柔らかさに着目した酸水素化物の秩序/無秩序構造の安定化メカニズム関して、理論と合成の両面からアプローチし、その設計指針を明らかにした。また酸化物イオンに比べてニクタイドやヒドリドが柔らかいことに着目して、高圧下での構造相転移を見出した。このような研究は、近年一般的な合成法になりつつある、GPaオーダーの合成法に関する物質の設計指針や、高圧下での物性制御の指針となるものであり、将来的な新物質探索や新物性探索につながる結果である。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (18 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results) Presentation (12 results) (of which Int'l Joint Research: 6 results,  Invited: 6 results) Remarks (1 results)

  • [Int'l Joint Research] University of Oxford(英国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] 南京理工大学(中国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Sequential Pressure-Induced B1-B2 Transitions in the Anion-Ordered Oxyhydride Ba2YHO32022

    • Author(s)
      Morgan Harry W. T.、Yamamoto Takafumi、Nishikubo Takumi、Ohmi Takuya、Koike Takehiro、Sakai Yuki、Azuma Masaki、Ishii Hirofumi、Kobayashi Genki、McGrady John E.
    • Journal Title

      Inorganic Chemistry

      Volume: 61 Issue: 18 Pages: 7043-7050

    • DOI

      10.1021/acs.inorgchem.2c00465

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] High-Pressure and High-Temperature Synthesis of Anion-Disordered Vanadium Perovskite Oxyhydrides2021

    • Author(s)
      Miyazaki Kazumasa、Ochi Masayuki、Nishikubo Takumi、Suzuki Jinya、Saito Takashi、Kamiyama Takashi、Kuroki Kazuhiko、Yamamoto Takafumi、Azuma Masaki
    • Journal Title

      Inorganic Chemistry

      Volume: 60 Issue: 20 Pages: 15751-15758

    • DOI

      10.1021/acs.inorgchem.1c02399

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pressure-Induced Collapse Transition in BaTi2Pn2O (Pn = As, Sb) with an Unusual Pn?Pn Bond Elongation2021

    • Author(s)
      Yamamoto Takafumi、Yajima Takeshi、Li Zhi、Kawakami Takateru、Nakano Kousuke、Tohyama Takami、Yagi Takehiko、Kobayashi Yoji、Kageyama Hiroshi
    • Journal Title

      Inorganic Chemistry

      Volume: 60 Issue: 4 Pages: 2228-2233

    • DOI

      10.1021/acs.inorgchem.0c02989

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] フラックスを用いたバナジウム酸水素化物の高圧合成と反応経路のその場観察2022

    • Author(s)
      鈴木 仁哉、西久保 匠、酒井 雄樹、Zhao Pan、齋藤 寛之、東 正樹、山本 隆文
    • Organizer
      日本セラミックス協会 第60回基礎科学討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Mixed-Anion Chemistry of Vanadium-Based Oxyhydrides2021

    • Author(s)
      Takafumi Yamamoto
    • Organizer
      International Conference on Mixed-Anion Compounds(ICMAC)
    • Related Report
      2021 Annual Research Report
  • [Presentation] Single crystal growth of perovskite oxyhydride under high pressure2021

    • Author(s)
      Jinya Suzuki, Takafumi Yamamoto, Masaki Azuma, Takumi Nishikubo
    • Organizer
      STAC12
    • Related Report
      2021 Annual Research Report
  • [Presentation] Controlling local structures of oxide-based mixed-anion ceramics2020

    • Author(s)
      山本隆文
    • Organizer
      錯体化学討論会「New design of coordination geometries centered in solid state materials 」
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] アニオンに着目した物質探索2020

    • Author(s)
      山本隆文
    • Organizer
      新学術領域「量子液晶の物性科学」オンライン研究会 量子物質開発フォーラム
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] アニオンに着目した物質・機能探索2020

    • Author(s)
      山本隆文
    • Organizer
      フロンティア材料研究所学術賞受賞講演会及び新任教員講演会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] アニオンに着目した物質開発2020

    • Author(s)
      山本隆文
    • Organizer
      第 132 回フロンティア材料研究所講演会(無機化学セミナー)
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Controlling the local structures of mixed anion compounds2019

    • Author(s)
      Takafumi Yamamoto
    • Organizer
      The 11th International Conference on the Science and Technology for Advanced Ceramics (STAC-11)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] New opportunities in chemistry from mixed-anion compounds2019

    • Author(s)
      Takafumi Yamamoto
    • Organizer
      GFMAT-2/Bio-4
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Controlling the Structure of Mixed Anion Compounds by Using High Pressure2019

    • Author(s)
      Takafumi Yamamoto
    • Organizer
      iLIM-4
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 複合アニオンによる新機能セラミックスの創製2019

    • Author(s)
      山本隆文
    • Organizer
      第19回 五セラミックス研究機関(東工大-名工大-JFCC-AIST-NIMS)合同講演会
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 高圧を用いた複合アニオンの構造制御2019

    • Author(s)
      山本隆文, 陰山洋
    • Organizer
      第13回 物性科学領域横断研究会
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks]

    • URL

      https://sites.google.com/view/takafumis-homepage

    • Related Report
      2020 Research-status Report

URL: 

Published: 2019-07-04   Modified: 2023-01-30  

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