The Effect of Polymer Molecular Weight on Adsorption
and Reduction of Pyridinium Polycations

G. Ya. Vyaseleva, R. K. Sabirov, I. R. Manyurov, A. E. Gvozdeva-Karelina, and V. P. Barabanov

Kazan State Technological University, Kazan, Tatarstan, Russia

Received July 4, 1995; in final form, January 29, 1996

Abstract—The adsorption characteristics and electroreduction of a number of monomer and polymer pyridin-
ium compounds are studied at the bismuth electrode. From the potential dependences of the differential capac-
itance, an increase in adsorbability of polymeric compounds, compared with their monomer analogs, is found.
However, at large polymerization degrees, the fraction of adsorbed units decreases due to steric complications.
Specific features of the polymer cation electroreduction are revealed. These involve both the splitting of the cur-
rent peak in the current–potential curves and a decrease in the peak height with the increasing polymer molec-
ular weight.

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