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Benzoylformamides as versatile photocaged bases for redox free radical photopolymerization

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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.

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Authors and Affiliations

  1. School of Media and Communication, Shenzhen Polytechnic, Shenzhen, 518055, China

    Ruixin Xu

  2. State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou, 510640, China

    Minghui He

  3. DSAPM Lab, School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou, 510275, China

    Jianwen Yang

Authors
  1. Ruixin Xu
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  2. Minghui He
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  3. Jianwen Yang
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Correspondence to Minghui He.

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Xu, R., He, M. & Yang, J. Benzoylformamides as versatile photocaged bases for redox free radical photopolymerization. Photochem Photobiol Sci 15, 1442–1447 (2016). https://doi.org/10.1039/c6pp00301j

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