Photocatalysis of viologens for photoinitiated polymerization using carboxylic acid as electron donors

doi:10.1016/j.jphotochem.2016.10.019

CORC > 重庆绿色智能技术研究院 > 中国科学院重庆绿色智能技术研究院 > 机器人与3D打印技术创新中心

	Photocatalysis of viologens for photoinitiated polymerization using carboxylic acid as electron donors
	Cao, Liangcheng1 ; Wang, Yuechuan 2
刊名	JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
	2017-01-15
卷号	333 页码:63-69
关键词	Viologen Photocatalysis Electron transfer Photopolymerization
ISSN号	1010-6030
DOI	10.1016/j.jphotochem.2016.10.019
通讯作者	Cao, LC (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Fangzheng Ave 266, Chongqing 400714, Peoples R China.
英文摘要	Hydroxyl radicals (OH), together with carbon-centered radicals (R), derived from photoinduced electron transfer (PET) interactions between viologen and carboxylic acid ion pairs ([bipy(++) . . .RCOOH]) ), were developed to photoinitiate the polymerization of various acrylate monomers in the presence of oxygen. The mechanism of the radicals' formation was established using nanosecond laser flash photolysis and electron spin resonance methods. Carboxylate anion (electron donnor, D) gave one electron to viologen (electron acceptor, A) via either intermolecule (D/A) or intramolecular (D-A) PET, to yield carboxylate radicals (RCOO) that later underwent decarboxylation, yielding R radicals which can initiate the photopolymerization of many acrylate monomers. Simultaneously, reduced viologen cation radical (bipy(+)) was oxidized by dissolved O-2 and returned back to bipy(++) dications. OH radicals emerged from the reaction of H+ with the superoxide radicals (O-2*(-)) that formed during the oxidation of In this way, viologens were observed to act as photocatalysts in the radical generation process based on their strong electron acceptor, as well as efficient light absorption nature. Photopolymerization performance with D-A type viologens, for instance, bipy(++)-(CH2)(n)COOH, extra carboxylic acid was not a requirement. (C) 2016 Elsevier B.V. All rights reserved.
资助项目	Natural Science Foundation of China (NSFC)[61505208]
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000389393100008
内容类型	期刊论文
源URL	[http://172.16.51.4:88/handle/2HOD01W0/276]
专题	机器人与3D打印技术创新中心
通讯作者	Cao, Liangcheng
作者单位	1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Fangzheng Ave 266, Chongqing 400714, Peoples R China 2.Sichuan Univ, State Key Lab Polymer Mat, Coll Polymer Sci & Engn, South Sect 1st Ring Rd 24, Chengdu 610065, Peoples R China
推荐引用方式 GB/T 7714	Cao, Liangcheng,Wang, Yuechuan. Photocatalysis of viologens for photoinitiated polymerization using carboxylic acid as electron donors[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,2017,333:63-69.
APA	Cao, Liangcheng,&Wang, Yuechuan.(2017).Photocatalysis of viologens for photoinitiated polymerization using carboxylic acid as electron donors.JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,333,63-69.
MLA	Cao, Liangcheng,et al."Photocatalysis of viologens for photoinitiated polymerization using carboxylic acid as electron donors".JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY 333(2017):63-69.