Recent advances on naphthoquinone-based photoinitiators of polymerization
Résumé
Photoinitiating systems activable under visible light are the focus of numerous studies, and this interest is directly related to the higher light penetration that can be obtained in this spectral range. Reactivity of the photoinitiating systems is another major concern of photopolymerists and this issue can be addressed by investigating new structures of dyes. In this field, naphthoquinones have only been scarcely examined as visible light photoinitiators of polymerization. Besides, since 2015, different strategies have been developed to design photoinitiators with naphthoquinone, and promising results have been obtained, positively paving the way for future developments. In this review, an overview of the different photoinitiators comprising a naphthoquinone unit is given and polymerization efficiencies of these new structures are compared to those of reference compounds.
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