SOLUTION AND SOLID-STATE ELECTROCHEMISTRY OF SOLUBLE SUBSTITUTED POLYTHIOPHENES

Poly(3-octylthiophene) (PT8), poly(3-tetradecylthiophene) (PT14) and p oly[(3-octyloxy)-4-methylthiophenel (POMT) have been analyzed by cycli c voltammetry in solution and as precast films. All polymers show in b oth conditions at least two distinct oxidation processes separated by ca. 200 mV. Moreover, although these polymers have a non-planar confor mation when in solution and a coplanar structure when in the solid sta te, these conformational differences are not detected in their respect ive cyclic voltammograms. It is then assumed that the dissolved polyme rs may adopt a coplanar conformation in the vicinity of the electrode.