Direct Observation of Perchlorate Incorporation Induced by Redox Reaction of Ferrocene Terminated Self-Assembled Monolayer Studied by in situ FT-Surface Enhanced Raman Spectroscopy

The incorporation of ClO4− into 8-ferrocenyloctanethiol (8FT) self-assembled monolayer (SAM) induced by the redox reaction at a gold wire electrode was demonstrated using in situ FT Raman spectroelectochemistry. Upon oxidation of the 8FT SAM, a band attributed to ClO4− was clearly observed and the band disappeared in its reduced state. On the other hand, when HNO3 was used as a supporting electrolyte, the band attributed to NO3− was not observed in the oxidized form of 8FT.