Tunable photoluminescent materials based on two phenylcarbazole-based dimers through the substituent groups

Two phenylcarbazole-based dimers have been obtained through the oxidation of 9-phenylcarbazole and 9-(4'-bromophenyl) in the presence of FeCl3, respectively. The maximal emission peaks of compounds 1 and 2 were observed at 465 and 413 nm, respectively, revealing that the luminescent properties were tuned by the substituent group. Compounds 1 and 2 display trans- and cis-formation structures, respectively, and they show high thermal stabilities.176