Influence of the supporting electrolyte and of film thickness on the ratiobetween the crystal and amorphous structure in electrosynthesised poly(4,4'-dipentoxy-2,2 '-bithiophene)

The voltammetric response and the pi --> pi* absorption band of poly(4,4'-d ipentoxy-2,2'-bithiophene) clearly depend on the supporting electrolyte use d in the electrochemical preparation. The X-ray diffraction experiments sho wed a more extended crystal phase in the polymer prepared with tetrabutylam monium tetrafluoroborate as electrolyte, while the same polymer prepared wi th tetrabutylammonium perchlorate is practically amorphous. (C) 1998 Elsevi er Science S.A. All rights reserved.