摘要
本文设计并制备了以香豆素并咔唑为共轭结构的草酸酯类光引发剂(2-OAME和4-OAME),分子中大π-共轭结构的引入实现了分子在LED光域的良好吸收。通过核磁共振谱对目标产物进行了结构验证,通过紫外-可见吸收光谱、荧光光谱和理论计算对分子的光化学及光物理性质进行了表征。研究表明,两个光引发剂在近紫外-可见光范围内均表现出优异的光吸收性质,并且在LED光源激发下具有良好的光引发聚合能力,4-OAME分子较2-OAME在同样的条件下表现出更好的光引发聚合能力,在近紫外-可见LED光聚合领域具有较大的应用潜力。
In this paper,two coumarin-carbazole based oxalate photoinitiators(2-OAME and 4-OAME)were designed and synthesized.By introducing the coumarin into carbazole group,theπ-conjugated structure is enlarged,resulting to the good absorption properties in UV-visible light range.The photophysical and photochemical properties were characterized by UV-Vis absorption spectra and FT-RTIR.The two photoinitiators exhibit excellent light absorption properties in the near UV-Vis range and have good photoinitiated polymerization ability under excitation by the LED light source.The 4-OAME molecule exhibited better photoinitiated polymerization ability under the same conditions than 2-OAME.The two photoinitiators have great application potential in the field of near-ultraviolet-visible LED photopolymerization.
作者
周茹春
柳宜卓
陈世雄
王伟杰
陈思琦
金明
ZHOU Ruchun;LIU Yizhuo;CHEN Shixiong;WANG Weijie;CHEN Siqi;JIN Ming(Department of Polymer Materials,School of Materials Science and Engineering,Tongji University,Shanghai 201804,P.R.China)
出处
《影像科学与光化学》
CAS
2019年第5期402-414,共13页
Imaging Science and Photochemistry
基金
国家自然科学基金面上项目(51873154)资助
