| 近红外电致变色胆甾相液晶高分子的设计、合成及旋光开关性质 |
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| 引用本文： | 陈丰坤,张洁,宛新华. 近红外电致变色胆甾相液晶高分子的设计、合成及旋光开关性质[J]. 中国科学:化学, 2011, 0(2): 341-350 |
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| 作者姓名： | 陈丰坤 张洁 宛新华 |
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| 作者单位： | 高分子化学与物理教育部重点实验室北京分子科学国家实验室北京大学化学与分子工程学院; |
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| 基金项目： | 国家自然科学基金(20834001)的资助 |
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| 摘 要： | 通过单体4′-甲氧基苯基-4-烯丙氧基苯甲酸酯(M1)、(S)-(-)-N-(5-己烯基)-6-(4′-(2-甲基丁氧基)苯基)-蒽醌-2,3-二羧酸酰亚胺(M2)与聚甲基氢硅氧烷间的硅氢加成反应,制得了3个新的具有近红外电致变色性质的侧链型液晶共聚物(PC5A10,PC5A20CB,PC5A30CB),并对其液晶性,电化学,光谱电化学和旋光开关性质进行了表征.当M2单体的含量为10mol%,20mol%时,共聚物可形成胆甾相液晶,而当其含量为30mol%时,所能形成的液晶相为近晶A相.3个共聚物的循环伏安曲线均出现了两对可逆的氧化还原峰,分别对应于蒽醌酰亚胺基团得电子而形成自由基阴离子和二价阴离子.中性态时,共聚物在420nm处有较强吸收,而当被还原为自由基阴离子后,在近红外区域840nm出现了新的强烈的吸收.以聚合物为阴极电致变色层,普鲁士蓝为离子储存层的全固态电致变色器件在800nm有较好的光学调制性.此外,本文还就该器件的电化学调控手性光开关性质进行了初步研究.
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| 关 键 词： | 胆甾相液晶 近红外电致变色 旋光开关 侧链型液晶高分子 |
Synthesis and characterization of novel near-infrared electrochromic cholesteric liquid crystalline polymers with chiroptical switching properties |
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| CHEN FengKun,ZHANG Jie , WAN XinHua Key Laboratory of Polymer Chemistry , Physics of Ministry of Education,Beijing National Laboratory for Molecular Sciences,College of Chemistry , Molecular Engineering,Peking University,Beijing ,China. Synthesis and characterization of novel near-infrared electrochromic cholesteric liquid crystalline polymers with chiroptical switching properties[J]. Scientia Sinica Chimica, 2011, 0(2): 341-350 |
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| Authors: | CHEN FengKun ZHANG Jie & WAN XinHua Key Laboratory of Polymer Chemistry & Physics of Ministry of Education Beijing National Laboratory for Molecular Sciences College of Chemistry & Molecular Engineering Peking University Beijing China |
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| Affiliation: | CHEN FengKun,ZHANG Jie & WAN XinHua Key Laboratory of Polymer Chemistry & Physics of Ministry of Education,Beijing National Laboratory for Molecular Sciences,College of Chemistry & Molecular Engineering,Peking University,Beijing 100871,China |
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| Abstract: | The side-chain liquid crystalline copolymers(PC5A10,PC5A20CB,PC5A30CB) bearing near-infrared electrochromic chromophores were synthesized by hydrosilylation reactions between 4'-methoxyphenyl 4-(allyloxy)benzoate(M1),(S)-(-)-N-(hex-6-enyl)-6-(4'-(2-methylbutoxy)phenyl)-anthraquinone-2,3-dicarboxylic imide(M2) and poly(methylhydrosiloxane).The thermotropic liquid crystalline properties,redox activities,and spectroelectrochemical behaviors of these polymers were characterized.The copolymers containing 10 mol%... |
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| Keywords: | cholesteric liquid crystal near-infrared electrochromism chiroptical switches side-chain liquid crystalline polymer |
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