New 2-(diethylamino)-4,6-diphenyl-benzene-1,3-dicarbonitrile derivatives were synthesized and proposed as high-performance photoinitiators in conjunction with iodonium salts for: (i) the cationic polymerization of epoxides, (ii) the free-radical polymerization of acrylates, and (iii) the synthesis of interpenetrating polymer networks (IPNs) from acrylate/epoxy blends. Investigated photoinitiating systems exhibit initiating efficiency upon exposure to soft irradiation conditions of visible light-emitting diodes (LEDs) with emission maxima at 405 nm and 420 nm. Excellent polymerization profiles are obtained during photopolymerization processes. The studied photoinitiating systems were also used for photosensitive resins for laser writing/3D printing experiments upon exposure to a laser diode at 405 nm. The photophysical and photochemical properties, i.e., absorption, steady-state photolysis and fluorescence spectroscopy, of terphenyl derivatives were studied. A photoinitiation mechanism related to the production of cations and radicals was studied using fluorescence quenching experiments, laser flash photolysis, cyclic voltammetry and electron spin resonance.

中文翻译：

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基于三联苯衍生物的新型双分子光引发体系，作为用于3D打印的高效光敏剂

合成了新的2-（二乙氨基）-4,6-二苯基-苯-1,3-二腈衍生物，并与碘鎓盐一起用作高性能光引发剂，用于：（i）环氧的阳离子聚合，（ii）丙烯酸酯的自由基聚合，以及（iii）由丙烯酸酯/环氧共混物合成互穿聚合物网络（IPN）。所研究的光引发系统在暴露于可见光发光二极管（LED）的软辐照条件下时显示出激发效率，该发光二极管的最大发射波长为405 nm和420 nm。在光聚合过程中获得了优异的聚合曲线。所研究的光引发体系还用于感光树脂，用于在405 nm的激光二极管上曝光后进行激光写入/ 3D打印实验。光物理和光化学性质，即，吸收，稳态光解光谱和荧光光谱，三联苯衍生物进行了研究。利用荧光猝灭实验，激光闪光光解，循环伏安法和电子自旋共振研究了与阳离子和自由基产生有关的光引发机理。