Ion-Exchange and Apparent Diffusion Coefficients Within Cationic Polysulfonium Coatings Containing Ferricyanide

Abstract

A cationic polyelectrolyte of various poly(arylenesulfonium salt)s were coated on the surface of glassy carbon electrodes with an incorporated ferricyanide anion from the electrolyte solutions. The apparent diffusion coefficients of that are electrostatically bound were determined by chronoamperometry, chronocoulometry and mediated electron transfer from the rotating disk voltammetry. The complex incorporated by the S-cationic polyelectrolyte shows a high diffusion coefficient for the polyelectrolyte of poly(methylsufonio-1,4-phenylenethio-1,4-phenylene trifluoromethanesulfonate). The diffusion of poly(arylenesulfonio triflate) depended on the ionic exchange of the S-cation which has an alkyl bond and the crystalline structure that influenced the electrostatic motion of the anion within the polyelectrolyte modified electrode.

Keywords:

• Cationic polyelectrolyte
• Polysulfonium
• Chronoamperometry
• Chronocoulometry
• Mediated electron transfer
• Diffusion coefficient

Acknowledgment

Eniya L. D. acknowledges Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists (No. 05709).

Notes

^†The synthesis was done with the processes as described in the literature[20] to get methylsulfonio-1,4-phenyleneimino-1,4-phenylene sulfoxide monomer. Then the polymerization of 6 was done as Mullen Method.[26]