Electrochemically controlled 2D assembly of paddle-wheel diruthenium complexes on the Au(111) surface and identification of their redox states

Soichiro Yoshimoto, Kouhei Sakata, Rempei Kuwahara, Keita Kuroiwa, Nobuo Kimizuka, Masashi Kunitake

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    1 Citation (Scopus)

    Abstract

    The 2D molecular assemblies of chloride-coordinated mixedvalence diruthenium complexes, each possessing phenyl, naphtyl, or anthracenyl moieties, were examined on an Au(111) at electrochemical interface. In situ scanning tunneling microscopy images revealed a clear dependence of the molecular assembly on both the nature of the aryl functional groups and on the redox state of the dinuclear ruthenium complex, either chloride-coordinated Ru II/Ru III or noncoordinated Ru II/Ru II. At potentials where the Ru II/Ru III and Ru II/Ru II redox states were in equilibrium, two distinct redox states were clearly identified at the single-molecular level. We found that manipulating both the electrochemical potential and the aryl functional group substitution was important for controlling the 2D molecular assembly of a chloride-coordinated diruthenium complex on an Au(111) surface.

    Original languageEnglish
    Pages (from-to)17729-17733
    Number of pages5
    JournalJournal of Physical Chemistry C
    Volume116
    Issue number33
    DOIs
    Publication statusPublished - Aug 23 2012

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Energy(all)
    • Physical and Theoretical Chemistry
    • Surfaces, Coatings and Films

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