Novel Photoresponsive Linear, Graft, and Comb-Like Copolymers with Azobenzene Chromophores in the Main-Chain and/or Side-Chain: Facile One-Pot Synthesis and Photoresponse Properties

被引：17
作者：
Ding, Liang [1 ]
Qiu, Jun [1 ]
Li, Juan [1 ]
Wang, Chengshuang [1 ]
Wang, Lingfang [1 ]
机构：
[1] Yancheng Inst Technol, Sch Mat Engn, Yancheng 224051, Peoples R China
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2015年 / 36卷 / 17期
基金：
中国国家自然科学基金;
关键词：
acyclic diene metathesis polymerization; one-pot processes; photoresponsive polymers; ring-opening metathesis polymerization; ACYCLIC DIENE METATHESIS; LIQUID-CRYSTALLINE POLYMERS; RING-OPENING METATHESIS; AZO-POLYMERS; DIBLOCK COPOLYMER; BLOCK-COPOLYMERS; POLYMERIZATION; POLYPHOSPHOESTERS; TRANSFORMATION; CATALYST;
D O I：
10.1002/marc.201500230
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Novel photoresponsive linear, graft, and comb-like copolymers with azobenzene chromophores in the main-chain and/or side-chain are prepared via a sequential ring-opening metathesis polymerization (ROMP) and head-to-tail acyclic diene metathesis (ADMET) polymerization in a one-pot procedure using Grubbs ruthenium-based catalysts. The diluted solutions of these as-prepared copolymers containing azobenzene chromophores exhibit photochemical trans-cis isomerization under the irradiation of UV light, followed by their cis-trans back-isomerization in visible light. The rates of photoisomerization are found to be slower than those of back-isomerization, and the rate for the comb-like copolymer is found to be from 3 to 7 times slower than that obtained for the linear or graft copolymer. This is ascribed to the differences in structure of the copolymers and the specific location of azobenzene chromophores in the copolymer, which favor a side-chain graft structure.
引用
收藏
页码：1578 / 1584
页数：7
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