Organic Letters p. 6138 - 6141 (2015)
Update date:2022-08-11
Topics:
Liu, Yulong
Shan, Tong
Yao, Liang
Bai, Qing
Guo, Yachen
Li, Jinyu
Han, Xiao
Li, Weijun
Wang, Zhiming
Yang, Bing
Lu, Ping
Ma, Yuguang
Two pyrene-imidazole-based structural isomers, axisymmetric syn-PyDTI and centrosymmetric anti-PyDTI, have been easily produced and successfully separated in a one-pot reaction. Crystalline syn-PyDTI exhibited a 2-fold higher quantum efficiency than anti-PyDTI and displayed a much better performance in OLEDs with a ηc.max of 11.4 cd A-1 (8.8 cd A-1 for anti-PyDTI), although they possess the same apparent electronic structure. Observations revealed that the molecular excited-state properties are derived from distinct structural symmetries.
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