The redox transformation process of different conducting polymers was studi
ed by combined in situ (spectroelectrochemistry, EQCM and conductance) tech
niques. The recently suggested modified mechanism of the charging/dischargi
ng process for polythiophenes received further approval by studies on 3-met
hylthiophene (PMT) co-polymers. The pattern of the change in the charge cap
acity of the oxidized polypyrrole (Pqr) film suggests -like in case of poly
thiophenes- the occurrence of the electric field induced phase transition.
Thus, a common redox mechanism for the different polymers-distinguishing so
lvated and non-solvated polymer segments- is assumed.