Synthesis and Optical Properties of Axially Chiral Bibenzo[b]carbazole Derivatives.

Pure organic materials with the circularly polarized luminescence (CPL) property have attracted significant research interest over the past few decades. In this study, a series of axially chiral bibenzo[b]carbazole derivatives were synthesized by adopting palladium- and iridium-catalyzed direct C-H functionalization reactions as the key steps. These compounds exhibited CPL characteristics with considerably large dissymmetry factors up to 2.81 × 10-2 in the solid state, indicating the formation of well-ordered aggregates.