Substituent effect to prevent autoxidation and improve spectral stability in blue light-emitting polyfluorenes

被引：49
作者：
Li, AY [1 ]
Ziegler, A [1 ]
Wegner, G [1 ]
机构：
[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
来源：
CHEMISTRY-A EUROPEAN JOURNAL | 2005年 / 11卷 / 15期
关键词：
electroluminescence; liquid crystals; luminescence; polymers;
D O I：
10.1002/chem.200401319
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A group of fluorene-based polymers, PF-1SOR and PF-2SOR, were synthesized and characterized as blue light-emitting materials. PF-1SOR and PF-2SOR displayed nematic liquid crystalline mesophase in films cast from solution. Compared with conventional polyfluorene, PF-1SOR and PF-2SOR display blue-shifted UV absorption and structureless blue fluorescence. The photoluminescence spectra of PF-1SOR and PF-2SOR were found insensitive against thermal treatment in air up to 200 degrees C and the blue electroluminescence in their light-emitting devices was independent of the driving voltage. Compared to the conventional polyfluorenes, the improved spectral stability of these polymers is attributed to the anti-oxidization effect of (3,5di(tert-butyl)phenoxy)sulfonyl side groups attached to the backbone.
引用
收藏
页码：4450 / 4457
页数：8
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