| Applications of time resolved surface enhanced Raman scattering (TRSERS) techniques for the study of surface photochemistry and electrochemistry were demonstrated.;As an example of TRSERS applications in surface photochemistry studies, direct photoinduced charge transfer from adsorbed flavin mononucleotide (FMN) to a Ag electrode was observed by TRSERS and complementary experiments. Two short lived photoproduct radical ion intermediates with life time of 775ns and 1.5;As an example of TRSERS applications in an electrochemical study, p-Nitrobenzoic acid (PNBA) was studied by TRSERS following the application of a double potential step to a Ag electrode. The spectral bands of three stable intermediate products, p-nitrosobenzoate, hydroxylamine, and azoxy compounds were observed. In addition, the transient bands of an unstable intermediate were seen at 996, 1233, and 1580cm;In addition, three redox states of FMN and interactions of FMN with a Ag electrode were studied by SERS, UV/Vis absorption spectrophotomerty and normal mode calculations. The adsorption site and orientation of FMN on a Ag electrode were found depending on the Ag electrode surface potential. The SERS spectrum of FMN hydroquinone was reported for the first time. |
