VOLTAMMETRIC BEHAVIOR OF THE BOLAFORM ELECTROLYTE ALPHA,ALPHA'-BIS(OXYPYRIDINIUM)-P-XYLENE DIBROMIDE IN 5-PERCENT DIMETHYL SULFOXIDE-WATER MIXTURE

Polarographic and cyclic voltammetric studies of the redox bolaform el ectrolyte alpha,alpha'-bis(oxypyridinium)-p-xylene dibromide were carr ied out in a 5% (v/v) dimethyl sulfoxide-water mixture. The compound r evealed a combined two electron diffusion-controlled cathodic wave whi ch is independent of pH and found totally irreversible in the time sca le of polarographic and cyclic voltammetric experiments. A tentative m echanism for the reduction process of E(i)C(i) type is proposed. Vario us kinetic parameters viz, transfer coefficient (alpha(n)), standard r ate constants (K(S), K(fh)o) and diffusion coefficient (D) from polaro graphic and cyclic voltammetric results are also evaluated.