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Displacement Control of Crystals of Metallocene-Containing Rotaxanes and Its Use to Cantilever Functions

Research Project

Project/Area Number 18K19095
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 34:Inorganic/coordination chemistry, analytical chemistry, and related fields
Research InstitutionTokyo Institute of Technology

Principal Investigator

Osakada Kohtaro  東京工業大学, 科学技術創成研究院, 教授 (00152455)

Project Period (FY) 2018-06-29 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2018: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywordsロタキサン / 単結晶 / アゾベンゼン / 光照射 / メタロセン / カンチレバー / 結晶 / 有機金属
Outline of Final Research Achievements

Single crystalline rotaxanes which composed of axle molecule equipped with photo-sensitive azobenzene group and redox active ferrocene group were prepared and subjected to the stimulus-response studies. Cationic axle components with azobenzene were mixed with the crown ethers to form the correspondind rotaxanes. Three rotaxanes having no substituents, and one methyl substituent, and one bromo substituent at the cyclic component were compared under the same conditions.The first rotaxane crystal did not respond to ultraviolet nor visible light irraditions. The second crystal undergoes reversible change of the shape upon the irraditaion at ultraviolet and visible lights. The rotaxane with the bromo substituent undergo irreversible change of the shape. Significant bending of the plate-like or needle-like crystals have potentially useful as the materials for cantilever.

Academic Significance and Societal Importance of the Research Achievements

機械や材料のマイクロ化が進行するとともに、刺激応答によって外形を変え、部品の位置を固定、変化させるカンチレバー型の素子が必要とされる。本研究によって柔軟性を有する有機金属ロタキサンの結晶が、光照射によって大きく傾きを変えること、これを照射波長及びロタキサンの置換基によって精密に制御できることがわかった。これらの成果は今後マイクロスケールの機械部品の作成や調整に資する可能性がある。さらに、従来期待されていた高分子素子に比較して精緻に分子設計できることから、さらに精密な素子としての利用が期待され、社会的な意義をもつと考えられる。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (6 results)

All 2020 2019 2018 Other

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

  • [Journal Article] Catalytic and stoichiometric reactions of Arylpalladium(II) complexes bearing a trans-chelating dinitrogen ligand with arylboronic acids2020

    • Author(s)
      Suzaki Yuji、Saito Takashi、Osakada Kohtaro
    • Journal Title

      Journal of Organometallic Chemistry

      Volume: 910 Pages: 121088-121088

    • DOI

      10.1016/j.jorganchem.2019.121088

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structure and properties of lantern-shaped hexapalladium complexes with germylene and thiolate ligands [Pd6(μ-GePh2)2(μ-SC6H4-p-X)2(CN-C6H3Me2-2,6)8] (X = NO2, Cl, H, CH3)2020

    • Author(s)
      Takeaki Koizumi, Kohtaro Osakada, Tomohito Ide
    • Journal Title

      European Journal of Inorganic Chemistry

      Volume: 2020

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 2つのチアントレニル基を有する新規有機化合物の結晶構造と相互作用2019

    • Author(s)
      阿部諒太、土戸良高、小坂田耕太郎
    • Organizer
      第30回基礎有機化学討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 光刺激に応答して回転速度を変調できる分子ギアの開発2019

    • Author(s)
      土戸 良高・山納 真人・小坂田 耕太郎
    • Organizer
      日本化学会第99春季年会
    • Related Report
      2018 Research-status Report
  • [Presentation] Controlling Dynamic Motion of a Molecular Bevel Gear with Reversible Brake System2018

    • Author(s)
      Makoto SANNO, Yoshitaka TSUCHIDO, Kohtaro OSAKADA
    • Organizer
      43rd International Conference on Coordination Chemistry
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Remarks] 東京工業大学化学生命科学研究所小坂田研究室業績

    • URL

      http://www.res.titech.ac.jp/~shinkin/presen.html

    • Related Report
      2018 Research-status Report

URL: 

Published: 2018-07-25   Modified: 2021-02-19  

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