Synthesis and characterization of deep blue emitters from starburst carbazole/fluorene compounds
作者:Zujin Zhao、Xinjun Xu、Xiaopeng Chen、Xiaoming Wang、Ping Lu、Gui Yu、Yunqi Liu
DOI:10.1016/j.tet.2007.12.059
日期:2008.3
A series of well-defined, highly fluorescent starburst compounds with a carbazole core and oligo(2,7-fluorene ethynylene) arms have been synthesized by Sonogashira coupling reaction and fully characterized. These conjugated compounds exhibit good solubility, high thermal stability, and excellent fluorescence quantum yields (up to 0.99). The incorporation of carbazole core interrupted the main-chain conjugation and resulted in blue-shifted absorption and emission. Moreover, deep blue light has been approached from organic light-emitting diodes (OLEDs) adopting these compounds as emitting layer. (c) 2008 Elsevier Ltd. All rights reserved.