Electrochemistry and electrocatalysis with myoglobin in 2C(12)N(+)PSS(-) multibilayer composite films

Stable thin films made from polyionic complex didodecyldimethylammonium pol ystyrenesulfonate (2C(12)N(+)PSS(-)) with incorporated myoglobin (Mb) on py rolytic graphite (PG) electrodes were characterized by voltammetry and othe r techniques. The Mb-2C(12)N(+)PSS(-) films showed a pair of near reversibl e CV peaks for MbFe(III)/Fe(II) couple at about -0.19 V vs. SCE in pH 5.5 b uffers. The electron transfer between Mb and PG electrodes was greatly enha nced in 2C(12)N(+)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 f or detecting the organohalides are discussed.