SEPARATION OF FARADAIC AND CAPACITIVE CURRENT REGIONS IN THE REDOX TRANSFORMATION OF POLY(3-METHYLTHIOPHENE) WITH THE EXCLUSION OF OVEROXIDATION PROCESSES

The electrostability of the poly(3-methylthiophene) film prepared in n itrobenzene provided the opportunity to study its redox transformation s in an extended anodic potential region with the exclusion of the ove roxidation. From spectroelectrochemical results a capacitive region co uld be separated in the highly oxidized state of the layer which exhib ited a large capacitance. This pattern-assumed to be related to charge separation/redistribution within the film at high potential field con nected to solvent movements-is promising from the point of view of sym metric p-type/n-type superconductors. Copyright (C) 1996 Elsevier Scie nce Ltd