Preparation and characterization of alternating copolymers containing fluorene and hexyl- or perfluorohexyl-substituted thiophene

被引：0
作者：
Yu, Chin-Yang [1 ]
Cheng, Yu-Sheng [1 ]
机构：
[1] Natl Taiwan Univ Sci & Technol, Dept Mat Sci & Engn, Taipei 10607, Taiwan
来源：
POLYMER INTERNATIONAL | 2015年 / 64卷 / 01期
关键词：
alternating copolymer; perfluorohexyl-substituted thiophene; steric hindrance; optical bandgap; photoluminescence quantum yield; LIGHT-EMITTING-DIODES; CONJUGATED POLYMERS; SOLAR-CELLS; SEMICONDUCTORS; POLYTHIOPHENE; DERIVATIVES; TRANSISTORS; CARBAZOLE; STABILITY; OLIGOMERS;
D O I：
10.1002/pi.4765
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Alternating copolymers containing fluorene and hexyl- or perfluorohexyl-substituted thiophene were synthesized by a palladium-catalyzed cross-coupling reaction, and the structures of the polymers were confirmed using nuclear magnetic resonance spectroscopy. The absorption spectra of polymers containing perfluorohexyl substituents show shorter maximum wavelength due to the steric hindrance between fluorene and substituted thiophene units. In addition, the perfluorohexyl substituents can effectively interrupt the conjugation length of the polymers, which leads to an increase in the optical bandgap and decrease in the photoluminescence quantum yield. Solid-state UV-visible absorption and emission maxima of the polymers containing perfluorohexyl-substituted thiophene units are blue-shifted in comparison to those of polymers in solution due to the packing structure of perfluoroalkyl chains. (c) 2014 Society of Chemical Industry
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页码：113 / 117
页数：5
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