%0 Journal Article
%A Otto Haas
%A James D Rudnicki
%A Frank R McLarnon
%A Elton J Cairns
%B Journal of the Chemical Society, Faraday Transactions
%D 1991
%G eng
%N 7
%P 939-945
%R 10.1039/FT9918700939
%T Mechanistic investigations of redox polymer-coated electrodes using probe-beam deflection and cyclic voltammetry
%V 87
%X <p>Optical probe-beam deflection signals, together with cyclic voltammograms, have been used to analyse the electron-transfer process at electrodes coated with [Ru(bpy)<small><sub>2</sub></small>ClPVP]Cl, polyaniline and poly(1-hydroxyphenazine). With this technique it is possible to determine if anions or cations are used as the charge-compensating ions in the electron-transfer process. The electron transfer at [Ru(bpy)<small><sub>2</sub></small>ClPVP]Cl was shown to be accompanied by a simple counter-ion diffusion process. The known electron-transfer mechanism of polyaniline was confirmed and a plausible mechanism for the electron transfer of poly(l-hydroxyphenazine) has been proposed. The additional information (direction of concentration gradients) obtained by a simple probe-beam deflection experiment is extremely useful in the analysis of reaction mechanisms at redox polymer-coated electrodes.</p>