SURFACE-ENHANCED RAMAN-SCATTERING OBSERVATION OF QUINHYDRONES FORMATION FROM THE REACTION OF HYDROQUINONE REDUCING SILVER BROMIDE SOL

In this paper, we report the surface enhanced Raman scattering (SERS) observation of quinhydrones (QHQ) formation from the reaction of hydro quinone (HQ) reducing AgBr sol. The SERS is shown to be that of QHQ ad sorbed on reduced silver clusters of AgBr sol through the study of the reaction of the intermediate benzoquinone (BQ) with HQ in silver sol and through the experiments of temperature-dependent UV-absorption spe ctra and the SERS of this process. Experiments also show that QHQ mole cules adsorb on silver clusters through their BQ rings, combining with the Agi ions of the silver clusters.