Simple azo derivatization on 4-aminothiophenol/Au monolayer

A stable and redox active monolayer of para-mercaptodiazoaminobenzene was achieved by direct diazotization on 4-aminothiophenol/Au monolayer. Electrochemical and surface-enhanced Raman scattering spectroscopy measurements were conducted before and after the reaction. The CV result, which exhibits two steps of reversible one-electron and one-proton oxidation and reduction, confirmed the grafting structure on 4-ATP monolayer.