Evidence for the contribution of sulfur-bromine intramolecular interactions to the self-rigidification of thiophene-based pi-conjugated systems

Bithiophene associating 3,4-ethylenedioxythiophene and 3-bromothiophene, and the corresponding polymer exhibit self-rigidified structures of the conjugated backbones resulting from the association of S-Br and S-O non-bonded intramolecular interactions.