Electrochemical and infrared spectroscopic study of the self-assembled monolayer of a cyano-bridged dimeric triruthenium complex on gold surface

Hua Xin Zhang, Yoichi Sasaki, Masaaki Abe, Yi Zhang, Shen Ye, Masatoshi Osawa, Kohei Uosaki

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

A new cyano-bridged dimeric oxo-centered triruthenium complex [{Ru 33-O)(μ-CH3COO)6(py) 2}(μ-CN){Ru33-O)(μ-CH 3COO)6(py)(Lpy-SS)}]+ (py = pyridine, Lpy-SS = (C5H4N-CH 2NHC(O)(CH2)4CH(CH2)2SS) ([1]+) has been prepared, characterized, and confined on an Au(1 1 1) surface to form self-assembled monolayers (SAMs) (1/Au). The redox and IR spectroscopic properties observed for the discrete ions are essentially preserved in its SAMs. The molecules of SAMs 1/Au stand up with the cyano groups tilted to the gold surface. The electronic structures of 1/Au in different oxidation states have been studied by in situ infrared spectroscopy monitoring the stretching modes of the cyano group. The extent of cyano-mediated electronic communications between two triruthenium units in the SAMs has been successfully tuned by simply changing the electrolyte solutions from 0.1 M n-Bu 4NPF6-CH2Cl2 to aqueous 0.1 M HClO4.

Original languageEnglish
Pages (from-to)51-55
Number of pages5
JournalJournal of Electroanalytical Chemistry
Volume714-715
DOIs
Publication statusPublished - 2014 Feb 1
Externally publishedYes

Keywords

  • Bridged cyanide
  • Gold surface
  • In situ infrared spectroscopy
  • Oxo-centered triruthenium complexes
  • Self-assembled monolayer

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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