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Cyclic Amphiphilic Random Copolymers Bearing Azobenzene Side Chains: Facile Synthesis and Topological Effects on Self‐Assembly and Photoisomerization
Author(s) -
Cai Ye,
Lu Jinjie,
Zhou Feng,
Zhou Xiaoji,
Zhou Nianchen,
Zhang Zhengbiao,
Zhu Xiulin
Publication year - 2014
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201300913
Subject(s) - azobenzene , photoisomerization , atom transfer radical polymerization , copolymer , polymer chemistry , materials science , amphiphile , gel permeation chromatography , side chain , polymerization , click chemistry , chemistry , organic chemistry , polymer , isomerization , catalysis , composite material
In this article, well‐defined cyclic amphiphilic random copolymers bearing azobenzene side chains and pendent carboxyl moieties, cyclic‐P(BHME m ‐ 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(BHME m ‐ 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.