Three carbazole Schiff base derived hexacatenar liquid crystals (LCs) L/n (n = 12, 14, 16) composed of salicylaldimines as the central core with N-trialkoxylbenzyl carbazole capped at one side and trialkoxybenzoate capped at the other side have been synthesized. The BF2 complex of L/12 was also successfully prepared. Both carbazole Schiff bases L/n and BF2 complex L-BF2/12 can self-assemble into luminescent Col(squ)/p4mm LC phases with local helical structures in their bulk states. L/n can additionally self-assemble into luminescent organogels with winkled morphologies. Study on the photophysical property indicates that both L/12 and its BF2 complex L-BF2/12 show large Stokes shift with yellow greenish emission. L/12 shows AIEE effect and can be applied as turn on Al3+ chemical sensors. BF2 complex L-BF2/12 with stronger emission than L/12 has been used to generate a white light emission diode (WLED).
[1]Yunnan Univ, Sch Chem Sci & Technol, Key Lab Med Chem Nat Resource, Minist Educ,Yunnan Res & Dev Ctr Nat Prod, Kunming 650091, Yunnan, Peoples R China.
[2]Kunming Med Univ, Affiliated Hosp 1, Dept Neurosurg, Kunming, Peoples R China.
(8.0+极速模式)