文献类型：期刊文献

英文题名：The facile synthesis and high efficiency of the red electroluminescent dopant DCINB: A promising alternative to DCJTB

作者：Zhao, Ping[1,2];Tang, Hao[3];Zhang, Qiong[1,2];Pi, Yajuan[1,2];Xu, Min[1,2];Sun, Runguang[3];Zhu, Weihong[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Shanghai Univ, Sch Mat Sci & Engn, Shanghai 201800, Peoples R China

年份：2009

卷号：82

期号：3

起止页码：316

外文期刊名：DYES AND PIGMENTS

收录：;EI(收录号：20091712052126);WOS:【SCI-EXPANDED(收录号:WOS:000266543900009)】；

基金：We thank the support from NSFC/China, the Program for New Century Excellent Talents in University (NCET-06-0418), Shanghai Shuguang Project (07SG34). and Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP 200802510011).

语种：英文

外文关键词：Synthesis; Indoline; Dopant; Red emitter; Electroluminescence; Optical properties

摘要：The cost of manufacturing 4-(dicyanomethylene)-2-tert-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) is prohibitively high because the synthesis of one of the key intermediates, 1,1,7,7-tetramethyljulolidine, is costly, produces by-products and is of low yield. As an alternative low-cost process, a novel red dopant 4-(dicyanomethylene)-2-tert-butyl-6-(8-(4-methyl)phenyl-2,3-dihydro-1H-cyclopenta [3a,8a]indolin-5-enyl)-4H-pyran (DCINB) bearing an indoline unit instead of 1,1,7,7-tetramethyljulolidine as electron donor has been conveniently synthesized in high yield. The dopant exhibited very similar absorption and emission behaviour to DCJTB, but displayed superior fluorescence quantum yield and electroluminescence efficiency, which was attributed to high recombination ratio of excitons imparted by the introduced indoline unit. The synthesis and purification stages are simple and can be scaled-up, thereby offering a possible alternative to the commercial DCJTB. (C) 2009 Elsevier Ltd. All rights reserved.