Triphenylamine based benzylidene ketones as visible-light-absorbing Type II photoinitiators for free radical photopolymerization
作者:Shan-Cian Wang、Yu-Hao Wu、Jyun-Bin Hsieh、Jen-Shyang Ni、Yung-Chung Chen
DOI:10.1016/j.jphotochem.2023.114870
日期:2023.9
triphenylamine benzylidene ketones had good light harvesting ranging from 350 to 500 nm. In addition, the core effects with alkane or alicyclic rings on the photophysical, thermal, photochemical and electrochemical properties for these compounds were investigated systematically. Finally, the photopolymerization experiments demonstrated that trimethylolpropane triacrylate (TMPTA) monomer can be initiated for photopolymerization
在这项研究中,合成了四种用于自由基光聚合的 II 型可见光吸收三苯胺亚苄基酮 ( C1F – C4F )。酮核的设计策略涉及对C1F使用环丁酮,对C2F使用环戊酮,对C3F使用环己酮,对C4F使用丙酮。结构经1 H NMR 确认,13分别为 C NMR 和质谱。三苯胺亚苄基酮在 350 至 500 nm 范围内具有良好的光捕获能力。此外,系统地研究了烷烃或脂环对这些化合物的光物理、热、光化学和电化学性质的核心效应。最后,光聚合实验表明,三羟甲基丙烷三丙烯酸酯 (TMPTA) 单体可以在 UV、LED@405 nm 和 LED@468 nm 曝光下通过三苯胺亚苄基酮 ( C1F – C4F )/三乙醇胺 (TEOA) 光引发体系引发光聚合。特别是,基于C4F的配方在 UV 和 LED@468 nm 曝光下表现出最佳的双键转换效率。另一方面,基于C1F的配方在 LED@405 nm 照射条件下