SYNERGISTIC COADSORPTION OF NICOTINIC-ACID AND 3-ACETYLPYRIDINE AS STUDIED BY SERS

Surface-enhanced Raman spectra of 3-acetylpyridine (3-ACP)+nicotinic a cid (NA)+0.1 mol l-1 NaCl solutions on polycrystalline silver electrod es are reported in the wavenumber range 500-1750 cm-1. The data were i nvestigated in order to draw reasonable conclusions about the molecula r structure in the electrolytic double-layer region. Band assignments were carried out according to the solution and surface-enhanced Raman shifts of the individual components. The surface active species were i dentified. A model based on an interaction between 3-ACP and NA is pro posed to explain the observed spectra.