Electrochemical polymerization of thiophene oligomers (n=4) bearing an hexamethylenic omega-methoxy functionalized side chain at the 3-3''' position of the thiophene rings, was performed in different solvents and electrode surfaces. The degree of polymerization and the electrochemical behaviour of the different electrosynthetized polymers were compared with a polymer obtained by a chemical method. The polymeric films were characterized using cyclic voltammetry, FT-IR, AFM and SEM microscopy. (C) 2007 Elsevier Ltd. All rights reserved.