Inluence of the supporting electrolyte and of film thickness on the ratio between the crystal and amorphous structure in electrosynthesised poly(4,4′-dipentoxy-2,2′-bithiophene)

The voltammetric response and the π→π* absorption band of poly(4,4′-dipentoxy-2,2′-bithiophene) clearly depend on the supporting electrolyte used in the electrochemical preparation. The X-ray diffraction experiments showed a more extended crystal phase in the polymer prepared with tetrabutylammonium tetrafluoroborate as electrolyte, while the same polymer prepared with tetrabutylammonium perchlorate is practically amorphous.