Tuning of photo‐ and electroluminescence in alkylated polythiophenes with well‐defined regioregularity

Color tuning of luminescence via molecular engineering of the Active polymer is important for the commercial application of pi-conjugated polymers in photonic devices. The synthesis of a series of regiospecific alkylated polythiophenes is described. in which the effective conjugation length could be varied by altering the length of the coplanar blocks between head-to-head dyads. It is demonstrated that the color-tuned materials obtained by this novel approach are potentially suitable for application in displays and other devices.