Synthesis and electrochemical behaviour of new polythiophenes branched with sulfonamides for solid phase synthesis

The synthesis of thiophenes 3-substituted by arylsulfonamide groups is desc ribed. Their electropolymerization and the characteristics of the polymers thus formed were studied, showing the importance of the nature of the space r intercalated between the thiophene unit and the electroactive cleavable a romatic function under electron transfer. The presence of an oxygen atom in an appropriate position in the chain appears to dramatically control the e lectrochemical stability and the electroactivity of the polymer.