Abstract
The adsorption of imidazole on a polycrystalline gold electrode has been studied with electrochemical methods (cyclic voltammetry, tensammetry) and Surface Enhanced Raman Spectroscopy (SERS). The results indicate a strong physisorption of the molecule when adsorbed from a neutral solution (Δ G 0 ad = −35.5 ± 0.5 kJ mol −1). SERS data indicate a molecular adsorption with a perpendicular orientation from solutions of 0.1 M KClO 4. From acidic solution a deprotonated imidazolate is adsorbed in a perpendicular orentation.
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