Polyfluorenes with phosphonate groups in the side chains as chemosensors and electroluminescent materials

被引：115

作者：

Zhou, G ^{[1
]}

Qian, G ^{[1
]}

Ma, L ^{[1
]}

Cheng, YX ^{[1
]}

Xie, ZY ^{[1
]}

Wang, LX ^{[1
]}

Jing, XB ^{[1
]}

Wang, FS ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Grad Sch, Changchun 130022, Peoples R China

来源：

MACROMOLECULES | 2005年 / 38卷 / 13期

关键词：

D O I：

10.1021/ma050807h

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polyfluorenes (P1 and P2) with phosphonate groups in the side chains were designed and synthesized. Their absorption and photoluminescence spectra in solutions are solvent dependent and exhibit a red shift up to 14 and 6 nm, respectively, with increasing solvent polarity. The polymers are highly soluble in ethanol with a solution photoluminescence quantum yield of 0.74. Polymer P2 in thin film cast from ethanol shows high intrachain order as revealed by red-shifted absorption spectrum and emission spectrum along with well-resolved vibronic structure. Both P1 and P2 are highly sensitive and selective Fe3+ sensory materials, and the sensitivity is much higher than that of model compounds 3 and 4. The highest sensitivity was observed with polymer P1, and a 210-fold fluorescence quenching in dichloromethane was achieved. Polymer light-emitting diodes (PLEDs) were also fabricated to investigate the electroluminescent properties. A luminous efficiency of 1.49 cd/A with Commission Internationale de L'Eclairage (CIE) coordinates of (0.171, 0.131) at 100 cd/m(2) and a maximum brightness of 1750 cd/m(2) have been demonstrated.

引用

页码：5416 / 5424

页数：9

共 55 条

[11] Interplay of physical structure and photophysics for a liquid crystalline polyfluorene [J].