Synthesis of Electron-Transporting Polymers Derived from a Heteroaryl Bis(trifluoroborate)

초록

In this presentation, we report that aryl bis(trifluoroborate)s make stable and easy-to-purify yet reactive monomers under Suzuki polycondensation reactions. A dipotassium bis(trifluoroborate) of 2-alkylbenzotriazole was prepared successfully and copolymerized with dibromobenzothiadiazole in the presence of a Pd catalyst and LiOH, yielding high molecular weight conjugated polymers. This polymer (P1) composed of all electron-accepting units shows excellent electron-transport properties (μe = 0.02 cm2 V-1 s-1), which proves the value of the aryl bis(trifluoroborate) monomers and suggests that more high-performance semiconducting polymers can be achieved by a similar approach.