Synthesis of Carbazole-containing 1,2-Azaborine Derivatives Using Bora-Friedel–Crafts Reaction and Their Photophysical Properties

Carbazole-containing 1,2-azaborine derivatives bearing various substituents were synthesized using bora-Friedel–Crafts reactions of 1,8-diphenylcarbazole derivatives, and the substituent effects on their photophysical properties were investigated. Furthermore, three carbazole-containing azaborine dimers with different annulation manners between the azaborine and benzene moieties were also successfully synthesized, and the effects of dimerization and differences in the annulation manners on their photophysical properties were disclosed. Carbazole-containing 1,2-azaborine derivatives bearing various substituents were synthesized by using bora-Friedel–Crafts reactions of 1,8-diphenylcarbazole derivatives, and the substituent effects on their photophysical properties were investigated. Furthermore, three carbazole-containing azaborine dimers with different annulation manners between the azaborine and benzene moieties were also successfully synthesized, and the effects of dimerization and differences in the annulation manners on their photophysical properties were disclosed.