The electrosynthesis of new mixed polymers, starting with the anodic oxidation of a dimer and a trimer of 3,4-ethylenedioxythiophene and dicyanomethylenefluorene is described together which the syntheses of the parent compounds. The resulting low bandgap polymers show different electrochemical behaviour, which is discussed. (C) 2003 Elsevier Science B.V. All rights reserved.