Plasmonic Scissors for Molecular Design

Authors

  • Prof. Mengtao Sun,

    Corresponding author
    1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P. O. Box 603-146, Beijing, 100190 (P. R. China)
    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P. O. Box 603-146, Beijing, 100190 (P. R. China)

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  • Dr. Zhenglong Zhang ,

    1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P. O. Box 603-146, Beijing, 100190 (P. R. China)
    2. School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710062 (P. R. China)
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  • Prof. Zee Hwan Kim,

    1. Department of Chemistry, Korea University, Seoul 136-701 (Korea)
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  • Prof. Hairong Zheng,

    1. School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710062 (P. R. China)
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  • Prof. Hongxing Xu

    1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P. O. Box 603-146, Beijing, 100190 (P. R. China)
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Abstract

Heterogeneous catalysts play an important role in surface catalytic reactions, but selective bond breaking and control of reaction products in catalytic processes remain significant challenges. High-vacuum tip-enhanced Raman spectroscopy (HV-TERS) is one of the best candidates to realize surface catalytic reactions. Herein, HV-TERS was employed in a new method to control dissociation by using hot electrons, generated from plasmon decay, as plasmonic scissors. In this method, the N[DOUBLE BOND]N bond in 4,4′-dimercaptoazobenzene was selectively dissociated by plasmonic scissors, and the reaction products formed from the radical fragment (SC6H5N) were controlled by varying the pH value. Under acidic conditions, p-aminothiophenol was produced from the radical fragment by attachment of hydrogen ions, whereas under alkaline conditions, 4-nitrobenzenethiol was obtained by attachment of oxygen ions to the substrate.

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