ELECTROCHEMISTRY AND ELECTROCATALYSIS WITH MYOGLOBIN IN 2C12N+PSS- MULTIBILAYER COMPOSITE FILMS

Stable thin films made from polyionic complex didodecyldimethylammonium polystyrenesulfonate (2C12N+PSS-) with incorporated myoglobin (Mb) on pyrolytic graphite (PG) electrodes were characterized by voltammetry and other techniques. The Mb-2C12N+PSS- films showed a pair of near reversible CV peaks for MbFe(III)/Fe(II) couple at about -0.19 V vs. SCE in pH 5.5 buffers. The electron transfer between Mb and PG electrodes was greatly enhanced in 2C12N+PSS- films. MbFe(I) was also produced in these films at about -1.08 V, and could be used to catalytically reduce some organohalide pollutants. The potential applications of the film electrode as a sensor for detecting the organohalides are discussed.