P421
Surface-enhanced Raman Scattering Studies on Photoelectrochemical Reduction of p-Nitrothiophenol Self-assembled Monolayer Formed on Silver Electrode
Naoki Matsuda
NIMC
It is well understood that thiols spontaneously form monolayer films on metal electrode surfaces. These self-assembled monolayers (SAM) are of much importance for many applications including modified electrodes. We have found that p-nitrothiophenol (PNTP) SAM films formed on silver, gold, and copper electrodes were reduced by laser light irradiation from surface-enhanced Raman scattering (SERS) spectra at the electrode potential where PNTP was electrochemically stable under dark. From SERS spectra, the reaction product on silver electrode was p-aminothiophenol (PATP). The reduction rates depended on the excitation wavelength and electrode potentials. The products with other conditions are investigated now. Additionally the mechanism of photoelectrochemical reduction of PNTP will be discussed.
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