Surface-enhanced resonance Raman scattering study on the axial ligation states of manganese and chromium tetraphenylporphines adsorbed on silver electrode surfaces

Abstract

Surface-enhanced resonance Raman scattering spectra (SERRS) in the region below 500 cm -1 were recorded for the manganese(III) and chromium(III) tetraphenylporphine complexes (TPP)Mn III X (X=Cl - , ClO 4 - ) and (TPP)Cr III X (X=Cl - , ClO 4 - ) absorbed on a silver electrode surface in acetonitrile (ACN). The surface spectra in the low-frequency region clearly reflect changes in the axial ligation states of the metalloporphines associated with the absorption process involving the silver electrode