The discovery in the year 1977, that polyacetylene upon oxidation with halogens becomes electrically conducting,1 can be regarded as the origin of a tempestuous development in the field of electrical conducting polymers, which was honoured with the Nobel prize in 2000. Nowadays, many of conducting polymers are based on pyrrole- and thiophene-derivatives, whereas 3,4- ethylenedioxythiophene (EDT) and its derivatives are currently extensively used.2 The search for conducting ...