title: Benzoylformamides as versatile photocaged bases for redox free radical photopolymerization.
abstract: Benzoylformamides (BFAs) are proposed as photocaged bases for redox free radical photopolymerization (FRP). Initially the dissolving capacity of BFAs was evaluated. Besides our previously reported photo-latent anion polymerization, BFAs, as versatile photocaged bases, can not only initiate the FRP of acrylates unassisted, but also perform redox FRP in combination with a benzoyl peroxide initiator. We detail a model photopolymerization in the presence of BFA-dBA (N,N-dibenzyl-2-oxo-2-phenylacetamide) as the photocaged base. In combination with a benzoyl peroxide initiator, BFAs are able to initiate the amine-mediated redox photopolymerization of acrylates, and enhance the photopolymerization rate. Finally, we investigated the mechanism of the radical formation to initiate the redox FRP, as exemplified by BFA-dBA.
authors.affiliation: School of Media and Communication, Shenzhen Polytechnic, Shenzhen, 518055, China.
authors.forename: Ruixin
authors.initials: R
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China. heminghui_2008@163.com.
authors.forename: Minghui
authors.initials: M
authors.lastname: He
authors.affiliation: DSAPM Lab, School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.
authors.forename: Jianwen
authors.initials: J
authors.lastname: Yang