Isomers of Pyrene鈥揑midazole Compounds: Synthesis and Configuration Effect on Optical Properties

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• 作者：Yulong Liu ; Tong Shan ; Liang Yao ; Qing Bai ; Yachen Guo ; Jinyu Li ; Xiao Han ; Weijun Li ; Zhiming Wang ; Bing Yang ; Ping Lu ; Yuguang Ma
• 刊名：Organic Letters
• 出版年：2015
• 出版时间：December 18, 2015
• 年：2015
• 卷：17
• 期：24
• 页码：6138-6141
• 全文大小：308K
• ISSN：1523-7052

文摘

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 畏_c.max of 11.4 cd A^鈥? (8.8 cd A^鈥? 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.