Photoinitiating systems combining 2,6-diaminoanthraquinone (AQD), iodonium salt (Iod), and benzyl alcohol derivatives have been developed to efficiently initiate the cationic polymerization of epoxy monomers upon light exposure. Electron spin resonance spin-trapping (ESR ST) experiments, fluorescence investigations, and steady-state photolysis have demonstrated that a dye-sensitized reaction occurs between AQD and the benzyl alcohol derivatives through a hydrogen abstraction mechanism upon light illumination, followed by reduction of Iod. The in situ liberation of protic acids promotes the cationic photopolymerization of epoxy monomers concomitantly with hydrolysis and condensation of the reactive methoxysilanes of an organic-inorganic precursor, for example, 3-glycidyloxypropyltrimethoxysilane (GPTMS). Nanoindentation experiments and scratch resistance tests proved that the resulting GPTMS coatings exhibit very good resistance to brittle fracture and excellent adherence to stainless-steel substrates. Interestingly, antibacterial tests of the GPTMS coatings showed efficient antifouling and biocide properties against E. coli and S. aureus.

中文翻译：

---

基于蒽醌衍生物的光引发体系：防污和杀菌剂涂层的合成。

已经开发了结合2，6-二氨基蒽醌（AQD），碘鎓盐（Iod）和苄醇衍生物的光引发体系，以在曝光后有效引发环氧单体的阳离子聚合。电子自旋共振自旋捕集（ESR ST）实验，荧光研究和稳态光解表明，在光照下，通过氢提取机理，AQD与苯甲醇衍生物之间会发生染料敏化反应，然后还原碘。质子酸的原位释放促进了环氧单体的阳离子光聚合，同时伴随有机-无机前体（例如3-环氧丙氧基丙基三甲氧基硅烷（GPTMS））的反应性甲氧基硅烷的水解和缩合。纳米压痕实验和耐刮擦性测试证明，所得的GPTMS涂层具有非常好的抗脆性断裂性能，并具有出色的对不锈钢基材的附着力。有趣的是，GPTMS涂层的抗菌测试显示出对大肠杆菌和金黄色葡萄球菌的有效防污和杀菌性能。