Investigation on the water-soluble ytterbium porphyrin - Part II - The electrochemical study of the ytterbium porphyrin complex

A two-electron irreversible adsorptive reduction peak was observed for the water-soluble ytterbium. complex by cyclic voltammetry at mercury electrode. At the surface of mercury electrode, the Yb-TPPS complex is adsorbed by the porphyrin ring, and the ytterbium. ion is sitting over the porphyrin plane. The centers of adsorption and the redox reaction for the Yb-TPPS complex are all dependent on the porphyrin ring. The Yb3+ ions do not take Dart in the electrochemical processes. After reduction, the ytterbium porphyrin complex is very unstable and disintegrates completely.Chemistry, MultidisciplinarySCI(E)0ARTICLE163-66