Surface-enhanced Raman spectroscopy on electrode surfaces as a tool to characterize LUMOs of inorganic complexes with two Different Ligands. The case of the Ion complex [Ru(bipy)_2viol]~+

摘要

A spectroelectrochemical [surface-enhanced Raman scattering (SERSt)] study of the ion complex [Ru(bipy)_2viol]~+ (bipy=2,2'-bipyridine and viol=1H,2H,5H-pyrimidine-2,4,5,6-tetraone-5-oxime) adsorbed on a silver electrode is presented. The SERS measurements showed that the vibrational modes of both ligands can be selectively enhanced by changing the potential applied to the electrode at a fixed laser excitation energy. The results indicate the presence of two different metal to adsorbate photon-assisted charge-transfer processes.