常见硒鎓盐光引发剂吸收波长短，难与 LED光源匹配。基于香豆素骨架，设计并合成了一系列具有不同取代基的香豆素基硒鎓盐，系统探究了这些光引发剂的构效关系。采用紫外 -可见（UV-Vis）分光光度计对所合成光引发剂的紫外吸收特性、光解行为以及光产酸过程进行了研究，利用傅立叶变换红外光谱仪（ FT-IR）对其光聚合动力学性能进行了测试分析，还通过实时核磁共振氢谱（¹H NMR）对目标化合物的光解机理进行了动态监测与解析。结果表明：香豆素基硒鎓盐是一类对紫外及可见光响应的单组分光引发剂，能分别引发丙烯酸单体、环氧单体以及丙烯酸与环氧的杂化体系聚合。在杂化聚合过程中，双键转化率达 75%~85%，环氧官能团转化率为 45%~55%。此项研究结果为长波长高效鎓盐光引发剂的设计提供了新思路。

The short absorption wavelengths of common selenium salt photoinitiatorsmake them challenging to match with LED light. In this paper，coumarin-based selenium salts with different substituents were designed and synthesized based on the coumarin skeleton，and then the structure-activity relationship were systematically investigated. The UV absorptioncharacteristics，photolysis behavior，and photoacid process of the synthesized photoinitiators were explored by UV-visible（UV-Vis） spectrophotometer. The kinetics of photopolymeri-zation were investigated and analyzed by Fourier transform infrared（FT-IR）. In addition，real-time nuclear magnetic resonance spectroscopy（¹H NMR） was employed to dynamicallymonitor and analyze the light action mechanism of the target compound. The results showedthat coumarin-based selenium salt was a monocomponent photoinitiator responsive to UV-visible light，which could initiate the polymerization of acrylic acid monomer，epoxy monomer and hybrid system of acrylic acid and epoxy，respectively. During hybrid polymerization process，the double bond and epoxy group conversion rate were 75%-85% and 45%-55%， respectively. This study provides a new idea for the design of long-wavelength efficient oniumsalt photoinitiators.