A polymer rigidity probe based on ultralong organic room temperature phosphorescence of a new skeleton benzo[4,5]imidazo[1,2-a]pyridine

We report a new backbone, BNPy. Copolymerizing MA and AA with BNPy derivatives extended UORTP to over 10 s. For BNPy-1, the τ p is closely related to the trend of matrix T g . Thus, BNPy-1 can be used as an efficient polymer rigidity (or T g ) probe.