Multi-responsive fluorescence of amphiphilic diblock copolymer   containing carboxylate azobenzene and N-isopropylacrylamide

doi:10.1016/j.polymer.2016.05.074

CORC > 北京大学 > 化学与分子工程学院

	Multi-responsive fluorescence of amphiphilic diblock copolymer containing carboxylate azobenzene and N-isopropylacrylamide
	Ren, Hao ; Chen, Dong ; Shi, Yan ; Yu, Haifeng ; Fu, Zhifeng
刊名	POLYMER
	2016
关键词	Multi-responsive block copolymer Carboxylic azobenzene Micellization induced fluorescence emission Poly(N-isopropylacrylamide) Thermally-induced fluorescence enhancement LIQUID-CRYSTALLINE POLYMER BLOCK-COPOLYMER DRUG-DELIVERY INTENSE FLUORESCENCE MICELLES LIGHT POLY(N-ISOPROPYLACRYLAMIDE) TEMPERATURE PHOTOISOMERIZATION ISOMERIZATION
DOI	10.1016/j.polymer.2016.05.074
英文摘要	One amphiphilic diblock copolymer poly(NIPAm-b-M6AzCOONa) with well-defined structure was synthesized by RAFT polymerization, in which N-isopropylacrylamide (NIPAM) was introduced as one thermoresponsive unit, and 6-[4-(4-sodium carboxylatephenylazo)phenoxyl]hexyl methacrylate (M6AzCOONa) was designed as pH-, UV-responsive and fluorescent units. The block copolymer was non-fluorescent in good solvent, but showed fluorescence emission when it formed micelle-like structures in water. The acquired fluorescence can be adjusted by UV or pH, which was strongly related to the aggregation tightness and size of the micelles. The block copolymer also showed reversible fluorescent enhancement in a large range of pH value (pH = 3-11) driven by thermally-induced coil-to-globule transition due to the existence of the PNIPAm block, which leads to a more closely-tightened aggregation of azobenzene moieties. These multiple-responsive fluorescence behaviors enable the amphiphilic block copolymer to find its applications for wide-pH-range fluorescence thermometer and fluorescence probe. (C) 2016 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [51322301, 51573005, 51373021]; National Research Foundation for the Doctoral Program of Higher Education of China [20120001120112]; Major Project of Beijing Science and Technology Program [Z141100003814011]; SCI(E); EI; ARTICLE; shiyan@mail.buct.edu.cn; yuhaifeng@pku.edu.cn; 533-542; 97
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/436127]
专题	化学与分子工程学院工学院
推荐引用方式 GB/T 7714	Ren, Hao,Chen, Dong,Shi, Yan,et al. Multi-responsive fluorescence of amphiphilic diblock copolymer containing carboxylate azobenzene and N-isopropylacrylamide[J]. POLYMER,2016.
APA	Ren, Hao,Chen, Dong,Shi, Yan,Yu, Haifeng,&Fu, Zhifeng.(2016).Multi-responsive fluorescence of amphiphilic diblock copolymer containing carboxylate azobenzene and N-isopropylacrylamide.POLYMER.
MLA	Ren, Hao,et al."Multi-responsive fluorescence of amphiphilic diblock copolymer containing carboxylate azobenzene and N-isopropylacrylamide".POLYMER (2016).