OXIDATIVE FORMATION OF ELECTROACTIVE FILM FROM POLYPYRIDINYL COMPLEXES OF RUTHENIUM(II)-CONTAINING 3-(PYRROL-1-YLMETHYL)PYRIDINE

This work reports the oxidative electrochemical polymerization of the trans-[RuCl2(pmp)(4)] monomer, where pmp = 3-(pyrrol-1-ylmethyl) pyrid ine. Its galvanostatic and potentiodynamic electropolymerization produ ced strongly adhesive and electroactive films on platinum, palladium a nd optically transparent electrodes. The efficiency of the film format ion indicated the existence of a strong correlation between the applie d upper-limit value of the potential range applied and the number of c ycles. Electrochemical studies show that the redox properties of poly- trans-[RuC2(pmp)(4)] are very similar to the monomer trans-[RuCl2(pmp) (4)] in solution. Morphology and thickness measurements studies were p erformed by scanning electron microscopy (SEM). Microprobe X-ray dispe rsive energy analysis (EDAX) on the polymeric surface has also been ca rried out. (C) 1997 Elsevier Science S.A.