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Single-molecule level control of host-guest interactions in metallocycle-C60 complexes

Author

Listed:
  • Jian-Hong Tang

    (Institute of Chemistry, Chinese Academy of Sciences
    University of Utah)

  • Yueqi Li

    (Arizona State University)

  • Qingqing Wu

    (Lancaster University)

  • Zixiao Wang

    (Nanjing University)

  • Songjun Hou

    (Lancaster University)

  • Kun Tang

    (Institute of Chemistry, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yue Sun

    (University of Utah)

  • Hui Wang

    (Nanjing University)

  • Heng Wang

    (University of South Florida)

  • Cheng Lu

    (CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences)

  • Xiang Wang

    (CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences)

  • Xiaopeng Li

    (University of South Florida)

  • Dong Wang

    (CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences)

  • Jiannian Yao

    (Institute of Chemistry, Chinese Academy of Sciences)

  • Colin J. Lambert

    (Lancaster University)

  • Nongjian Tao

    (Arizona State University
    Nanjing University)

  • Yu-Wu Zhong

    (Institute of Chemistry, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Peter J. Stang

    (University of Utah)

Abstract

Host−guest interactions are of central importance in many biological and chemical processes. However, the investigation of the formation and decomplexation of host−guest systems at the single-molecule level has been a challenging task. Here we show that the single-molecule conductance of organoplatinum(II) metallocycle hosts can be enhanced by an order of magnitude by the incorporation of a C60 guest molecule. Mechanically stretching the metallocycle-C60 junction with a scanning tunneling microscopy break junction technique causes the release of the C60 guest from the metallocycle, and consequently the conductance switches back to the free-host level. Metallocycle hosts with different shapes and cavity sizes show different degrees of flexibility to accommodate the C60 guest in response to mechanical stretching. DFT calculations provide further insights into the electronic structures and charge transport properties of the molecular junctions based on metallocycles and the metallocycle-C60 complexes.

Suggested Citation

  • Jian-Hong Tang & Yueqi Li & Qingqing Wu & Zixiao Wang & Songjun Hou & Kun Tang & Yue Sun & Hui Wang & Heng Wang & Cheng Lu & Xiang Wang & Xiaopeng Li & Dong Wang & Jiannian Yao & Colin J. Lambert & No, 2019. "Single-molecule level control of host-guest interactions in metallocycle-C60 complexes," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12534-6
    DOI: 10.1038/s41467-019-12534-6
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