SYNTHESIS AND PROPERTIES OF FURANYL-SUBSTITUTED [1]BENZOTHIENO[3,2-B][1]BENZOTHIOPHENE DERIVATIVES

[1]Benzothieno[3,2-b][1]benzothiophene (BTBT) derivatives attract attention in the field of organic optoelectronics due to their stability in air, 2D film formation ability and high charge-carrier mobility. Here we present approaches to the synthesis of new furanyl-substituted BTBT derivatives. The physicochemical properties of the target compounds were studied. It is shown that all materials have high quantum yields of photoluminescence. A thorough analysis of BTBT bromination has been carried out, and the reaction conditions were optimised. It has been shown that a mixture of regioisomers is always formed in this process, but this does not necessarily interfere with further synthesis. A significant reduction in the total reaction time from 48 to 6 hours has been achieved.