芴
咔唑
铃木反应
凝胶渗透色谱法
单体
噻吩
共聚物
高分子化学
材料科学
聚合物
部分
光化学
烷基
荧光光谱法
三合会(社会学)
赫克反应
溶解度
化学
荧光
有机化学
心理学
物理
复合材料
量子力学
精神分析
芳基
作者
Jared F. Mike,Jeremy J. Intemann,Min Cai,Teng Xiao,Ruth Shinar,J. Shinar,Malika Jeffries‐EL
出处
期刊:Polymer Chemistry
[The Royal Society of Chemistry]
日期:2011-01-01
卷期号:2 (10): 2299-2299
被引量:18
摘要
We report the synthesis and lumuminescence properties of three novel polymers composed of 9,9-dioctylfluorene and a donor–acceptor-donor (D–A-D) triad of a benzobisazole moiety sandwiched between two octylthiophenes. The requiste monomers, 2,6-bis(5-bromo-3-octylthiophen-2-yl)-benzobisazoles were obtained efficiently via the Lewis acid catalyzed cyclization of 2-bromo-3-octyl-5-(triethoxymethyl)thiophene and the corresponding diamino diols or dithiols. The polymers were synthesized in excellent yield by the Suzuki coupling reaction between the D–A-D benzobisazole monomers and 9,9-dioctylfluorene bisboronic acid. Alkyl side chains provided the polymers with solubility in common organic solvents, enabling characterization using gel permeation chromatography, 1H NMR, UV-Vis and fluorescence spectroscopy. The polymers have optical bandgaps of 2.43–2.63 eV and HOMO levels at −5.54 to −5.65 eV relative to vacuum as determined by UV visible and photoelectron spectroscopy respectively. Light-emitting diodes using blends of the copolymers in a poly(N-vinyl carbazole) matrix yielded blue-green emission with luminous efficiencies of 0.86 Cd/A at ∼505 nm. This efficient and high-yielding route is a promising approach for the synthesis of polymers containing benzobisazole moieties.
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