Scheme 1. Chemical structures of B- and N-embedded phosphorescent iridium complexes (Ir-ON, Ir-NN, Ir-OB and Ir-BB) and the model complex Ir-OO, and the conversion from tricoordinate B-embedded complexes (Ir-OB and Ir-BB) to their corresponding tetracoordinate Lewis adducts (Ir-OB·L and Ir-BB·L) in the presence of Lewis base L.
