A new organic photocatalyst (9,10-bis[(triisopropylsilyl)ethynyl]anthracene, An-Si) is proposed here for the formation of free radicals under very soft irradiation conditions under air through a photoredox catalysis. It works according to an oxidative cycle that uses the combination of An-Si, a diphenyl iodonium salt along with a silane. This behavior is highlighted through an investigation of its excited state and redox properties. The different chemical intermediates are characterized by ESR experiments. In addition, the reversibility of the oxidation reaction of An-Si was investigated by cyclic voltammetry. This three-component system is able to promote the ring-opening photopolymerization of an epoxide as well as the free radical photopolymerization of an acrylate upon household LED bulb and Xe lamp exposure. Excellent polymerization profiles (mainly in ROP) are obtained. The specific properties of this catalyst are outlined.

中文翻译：

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用于聚合反应的有机光催化剂：9,10-双[（三异丙基甲硅烷基）乙炔基]蒽

本文提出了一种新的有机光催化剂（9,10-双[（三异丙基甲硅烷基）乙炔基]蒽，An-Si），用于在非常柔和的辐射条件下，通过光氧化还原催化在空气中形成自由基。它根据将An-Si，二苯基碘鎓盐与硅烷结合使用的氧化循环进行工作。通过研究其激发态和氧化还原特性可以突出这种行为。通过ESR实验来表征不同的化学中间体。此外，An-Si的氧化反应具有可逆性用循环伏安法研究。这种三组分体系能够在家用LED灯泡和Xe灯暴露下促进环氧化物的开环光聚合以及丙烯酸酯的自由基光聚合。获得了优异的聚合曲线（主要在ROP中）。概述了该催化剂的具体性能。