ELECTROCHEMICAL STUDY ON MONOMER DIMER EQUILIBRIA OF A SERIES OF ASYMMETRIC VIOLOGEN MONOLAYERS ON THE ELECTRODE SURFACE IN THE PRESENCE OFHEXAFLUOROPHOSPHATE ION/

Monolayers and multilayers of asymmetric N-ethyl-N'-tetradecyl (or hex adecyl, octadecyl) viologens adsorbed on a glassy carbon electrode exh ibit two couples of well-resolved redox waves for the first reduction in the presence of hexafluorophosphate (PF6-) ion. The redox wave obse rved at less negative potentials was assigned to the viologen dimer on the electrode surface. These asymmetric viologens were closely packed and well-organized on the electrode surface in the presence of PF6- i ons, resulting in dimerization. (C) 1997 Elsevier Science S.A.