Electronic structure and vibrational spectrum of semicarbazide

Re‐examination of the adsorption and reduction processes of thiosemicarbazide at a silver electrode: SERS, UV–visible and capillary electrophoresis studies

“…In acidic solution, the relative intensities of the bands of the H 3 N C NH and NCN groups also decrease during the negative potential sweeping, owing to the breaking of the hydrogen bonds formed between the H 3 N C group of the adsorbed compound and the coadsorbed Cl . At more negative potentials, there is an increase in the relative intensity of the bands at 602 and 703 cm 1 assigned to υ CS C υ NCN and (CS), respectively, 28,29 which indicates that, in this potential range, the H C TSC interacts with the surface mainly through the S atom. It is worth noting that, in the SERS spectra at potentials more negative than 0.6 V, no bands that could have been assigned to the faradaic reduction product of TSC were observed.…”