A thioxanthone-based photocaged superbase for highly effective free radical photopolymerization  

作　　者：Ming-Hui He Rui-Xin Xu Guang-Xue Chen Zhao-Hua Zeng Jian-Wen Yang 

机构地区：[1]State Key Laboratory of Pulp & Paper Engineering, South China University of Technology [2]School of Media and Communication,Shenzhen Polytechnic [3]Institute of Polymer Science, DSAPM Lab, School of Chemistry and Chemical Engineering, Sun Yat-Sen University

出　　处：《Chinese Chemical Letters》2014年第11期1445-1448,共4页中国化学快报（英文版）

基　　金：financially supported by National Natural Science Foundation of China(No.20974127,21374135);China Postdoctoral Science Foundation(No.2013M542178);the Open Foundation of the State Key Laboratory of Pulp and Paper Engineering in South China University of Technology(No.C713043z);the Fundamental Research Funds for the Central Universities(No.2013ZB0025)

摘　　要：Thioxanthone-based N-phthalimidoamino acid ammonium salt（thioxanthen-DBU） as a photocaged base was synthesized and characterized. The photochemical properties and initiation mechanism were analyzed. It was found that the compound absorbs over the UV and visible region with relatively high absorption coefficients. Furthermore, the covalent binding of N-phthalimidoamino acid and type II chromophores（thioxanthone, TX） remarkably improved the photoreactivity. Specifically, in combination with a benzoyl peroxide initiator, thioxanthen-DBU was able to initiate the amine-mediated redox photopolymerization of trimethylol propane triacrylate（TMPTA）, and an excellent photopolymerization profile was obtained.Thioxanthone-based N-phthalimidoamino acid ammonium salt（thioxanthen-DBU） as a photocaged base was synthesized and characterized. The photochemical properties and initiation mechanism were analyzed. It was found that the compound absorbs over the UV and visible region with relatively high absorption coefficients. Furthermore, the covalent binding of N-phthalimidoamino acid and type II chromophores（thioxanthone, TX） remarkably improved the photoreactivity. Specifically, in combination with a benzoyl peroxide initiator, thioxanthen-DBU was able to initiate the amine-mediated redox photopolymerization of trimethylol propane triacrylate（TMPTA）, and an excellent photopolymerization profile was obtained.

关 键 词：Photocaged superbase Redox initiation Photopolymerization 

分 类 号：O631.5[理学—高分子化学]