Electron-transporting polymers based on a double B←N bridged bipyridine (BNBP) unit

In this communication, we report a series of polymer semiconductors based on a novel electron-deficient building block, double B←N bridged bipyridine (BNBP). These polymers show ambipolar or unipolar n-channel charge-transporting characteristics with electron mobilities in the range of 0.02–0.32 cm2 V−1 s−1 in organic thin film transistors.