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

Research output: Contribution to journalArticlepeer-review

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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