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Metal-centred azaphosphatriptycene gear with a photo- and thermally driven mechanical switching function based on coordination isomerism

Author

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  • Hitoshi Ube

    (Graduate School of Science, The University of Tokyo)

  • Yoshihiro Yasuda

    (Graduate School of Science, The University of Tokyo)

  • Hiroyasu Sato

    (Rigaku Corporation)

  • Mitsuhiko Shionoya

    (Graduate School of Science, The University of Tokyo)

Abstract

Metal ions can serve as a centre of molecular motions due to their coordination geometry, reversible bonding nature and external stimuli responsiveness. Such essential features of metal ions have been utilized for metal-mediated molecular machines with the ability to motion switch via metallation/demetallation or coordination number variation at the metal centre; however, motion switching based on the change in coordination geometry remain largely unexplored. Herein, we report a PtII-centred molecular gear that demonstrates control of rotor engagement and disengagement based on photo- and thermally driven cis–trans isomerization at the PtII centre. This molecular rotary motion transmitter has been constructed from two coordinating azaphosphatriptycene rotators and one PtII ion as a stator. Isomerization between an engaged cis-form and a disengaged trans-form is reversibly driven by ultraviolet irradiation and heating. Such a photo- and thermally triggered motional interconversion between engaged/disengaged states on a metal ion would provide a selector switch for more complex interlocking systems.

Suggested Citation

  • Hitoshi Ube & Yoshihiro Yasuda & Hiroyasu Sato & Mitsuhiko Shionoya, 2017. "Metal-centred azaphosphatriptycene gear with a photo- and thermally driven mechanical switching function based on coordination isomerism," Nature Communications, Nature, vol. 8(1), pages 1-6, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14296
    DOI: 10.1038/ncomms14296
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    Cited by:

    1. Tomoki Nakajima & Shohei Tashiro & Masahiro Ehara & Mitsuhiko Shionoya, 2023. "Selective synthesis of tightly- and loosely-twisted metallomacrocycle isomers towards precise control of helicity inversion motion," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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