Thioxanthone-Diphenyl Anthracene: Visible Light Photoinitiator

OpenAlex İngilizce

7,12-Diphenyl-14 H -naphto[2,3- b ]thioxanthen-14-one (TX-DPA) was synthesized and characterized as a potential visible light photoinitiator for radical polymerization. TX-DPA has an excellent absorption character in the visible region and the photophysical properties of TX-DPA were investigated by fluorescence and laser flash photolysis studies and the photopolymerization of methyl methacrylate in air atmosphere helped to understand the initiation mechanism of TX-DPA. Moreover, it is possible that the production of singlet oxygen from the quenching of 3 TX-DPA by molecular oxygen resulted in the reaction of singlet oxygen with TX-DPA to form an endoperoxide: decomposition of endoperoxide leads to initiating radicals.