Poly(3-nonylthiophene-co-methylthiophene)s: New soluble conductive copolymers

摘要

New conductive soluble copolymers of 3-nonylthiophene (3NT) and 3-methylthiophene (3MT) werechemically synthetized using FeCl3 in chloroform solution as acatalyst at room temperature and a N2 atmosphere. The structuralproperties of the undoped and iodine doped 3NT-co-3MT havebeen studied by UV-Vis, FTIR, 1H- and 13C-NMR, GPC, DSC,TGA, WAXD, magnetic susceptibility and charge transfermeasurements. The results show that copolymers (3NT-co-3MT)have a random arrangement. These copolymers have good thermalstability dependent on the 3NT. 3MT content and low magneticsusceptibility (typical for compounds of this class )whichdecreases with increasing temperature. The conductivity of theiodine doped copolymer (3NT-co-3MT) (measured in the dark atroom temperature) increases distinctly in comparison to theundoped samples (2-8×10-9 Sm-1).