TUNING OF PHOTOLUMINESCENCE AND ELECTROLUMINESCENCE IN ALKYLATED POLYTHIOPHENES WITH WELL-DEFINED REGIOREGULARITY

Color tuning of luminescence via molecular engineering of the Active p olymer is important for the commercial application of pi-conjugated po lymers in photonic devices. The synthesis of a series of regiospecific alkylated polythiophenes is described. in which the effective conjuga tion length could be varied by altering the length of the coplanar blo cks between head-to-head dyads. It is demonstrated that the color-tune d materials obtained by this novel approach are potentially suitable f or application in displays and other devices.