Eaton's reagent Assisted Aromatic C-C Coupling of Carbazoles for Optoelectronic Applications

An Eaton's reagent assisted C(sp(2))-C(sp(2)) coupling via the Scholl reaction mechanism was developed to prepare bicarbazoles without using any solvents and catalysts. The resulting biaryl exhibits unique optoelectronic properties as a promising host material of blue phosphorescent organic light emitting diodes, achieving high current efficiency up to 31.7 cd A(-1) with ultralow roll-off.