Cyclic Amphiphilic Random Copolymers Bearing Azobenzene Side Chains: Facile Synthesis and Topological Effects on Self-Assembly and Photoisomerization
Cyclic Amphiphilic Random Copolymers Bearing Azobenzene Side Chains: Facile Synthesis and Topological Effects on Self-Assembly and Photoisomerization
复制标题
带有偶氮苯侧链的环状两亲性无规共聚物：简易合成以及对自组装和光异构化的拓扑效应
DOI：
10.1002/marc.201300913
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发表时间：
2014-05-01
影响因子：
4.6
通讯作者：
Zhu, Xiulin
中科院分区：
文献类型：
--
作者：
Cai, Ye;Lu, Jinjie;Zhu, Xiulin
本文将原子转移自由基聚合与铜(I)催化的叠氮化物/烯烃环加成点击反应和叔丁酯的选择性水解相结合，合成了含偶氮苯侧链和侧链羧基的环状两亲无规共聚物--环P(BHMEM-co-AA(N))S。通过常规凝胶渗透色谱、三重检测凝胶渗透色谱、核磁共振、傅里叶变换红外光谱和基质辅助激光解吸电离飞行时间质谱仪对合成的环-P(BHMEM-co-AA(N))S进行了表征和验证。与线性聚合物相比，环状拓扑结构对聚合物的玻璃化转变温度、自组装行为和光响应性能产生了深远的影响。
In this article, well-defined cyclic amphiphilic random copolymers bearing azobenzene side chains and pendent carboxyl moieties, cyclic-P(BHMEm-co-AA(n))s, are synthesized by combining atom transfer radical polymerization (ATRP) with Cu(I)-catalyzed azide/alkyne cycloaddition (CuAAC) click reaction and selective hydrolysis of tert-butyl ester. Successful synthesis of the cyclic-P(BHMEm-co-AA(n))s is fully characterized and verified via conventional gel permeation chromatography, triple detection gel permeation chromatography, nuclear magnetic resonance, Fourier transform infrared, and matrix-assisted laser desorption ionization-time-of-flight mass spectrometry. The cyclic topology induces profound effects on the glass transition temperatures, self-assembly behavior, and photoresponsive performance of the copolymers compared with their linear counterparts.