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    张婉, 蔡鑫烨, 李红坤, 李永舫. 含氨基酸侧基的聚集诱导发光聚合物的合成及表征[J]. 功能高分子学报, 2019, 32(6): 711-717. doi: 10.14133/j.cnki.1008-9357.20190729002
    引用本文: 张婉, 蔡鑫烨, 李红坤, 李永舫. 含氨基酸侧基的聚集诱导发光聚合物的合成及表征[J]. 功能高分子学报, 2019, 32(6): 711-717. doi: 10.14133/j.cnki.1008-9357.20190729002
    ZHANG Wan, CAI Xinye, LI Hongkun, LI Yongfang. Synthesis and Characterization of an Aggregation-Induced Emission-Active Polymer with Amino Acid-Containing Side Chains[J]. Journal of Functional Polymers, 2019, 32(6): 711-717. doi: 10.14133/j.cnki.1008-9357.20190729002
    Citation: ZHANG Wan, CAI Xinye, LI Hongkun, LI Yongfang. Synthesis and Characterization of an Aggregation-Induced Emission-Active Polymer with Amino Acid-Containing Side Chains[J]. Journal of Functional Polymers, 2019, 32(6): 711-717. doi: 10.14133/j.cnki.1008-9357.20190729002

    含氨基酸侧基的聚集诱导发光聚合物的合成及表征

    Synthesis and Characterization of an Aggregation-Induced Emission-Active Polymer with Amino Acid-Containing Side Chains

    • 摘要: 首先采用一价铜催化的炔与叠氮的点击反应合成了含有L-缬氨酸基团的二元芳基溴单体( 1 ),然后以 1 和含四苯基乙烯单元的二炔单体( 2 )通过Sonogashira偶联聚合反应制备了一种含有手性氨基酸侧基的共轭聚合物P(TPE-Val)。通过红外吸收光谱、核磁共振谱、凝胶渗透色谱、热重分析、荧光光谱、圆二色光谱和扫描电镜对该聚合物的结构和性能进行了表征。结果表明:P(TPE-Val)在稀溶液中发光微弱而在聚集态发光强烈,表现出聚集诱导发光效应;该聚合物在聚集态具有圆二色信号,在四氢呋喃溶液中可以组装为螺旋纳米纤维。

       

      Abstract: A dibromo aryl monomer ( 1 ) bearing L-valine methyl ester group was synthesized by the Cu(I)-catalyzed azide-alkyne click reaction. The Sonogashira polycoupling between 1 and tetraphenylethene (TPE)-containing diethynyl monomer ( 2 ) was then carried out, affording a soluble TPE-based conjugated polymer P (TPE-Val) decorated with chiral amino acid-containing side chains. The structure of the polymer as characterized by Fourier transform-infrared (FT-IR) spectroscopy, nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), and thermo gravimetric analyzer (TGA). The properties of the polymer were investigated by fluorescence spectroscopy, circular dichroism spectroscopy, and scanning electron microscopy (SEM). The emission of the polymer is very weak in its dilute solution, but turns to be very high in the aggregated state, showing aggregation-induced emission (AIE) characteristics. Furthermore, the polymer gives circular dichroism (CD) signals in the aggregated state, and has the capacity to self-assemble into helical nanofibers.

       

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