Department of Organic Chemistry, College of Science, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yatsen University, Guangzhou, 510006, P. R. China.
Macromol Rapid Commun. 2019 Oct;40(20):e1900291. doi: 10.1002/marc.201900291. Epub 2019 Aug 20.
Difluoroboron β-diketonate dyes are reported to exhibit excellent photophysical properties (e.g., broad absorption and large extinction coefficients) and have the potential to act as high-performance photosensitizers in cationic photopolymerization (CP). In this study, four curcuminoid-based difluoroboron dyes (BF Curs) are prepared. Their ability to initiate the CP of epoxides or vinyl ethers in combination with an iodonium salt under yellow and red LEDs is investigated. Some of the BF Curs-based photoinitiating systems exhibit much higher efficiencies than the reported anthraquinone derivative Oil Blue N (OBN). The molecular structure of BF Curs is found to play a critical role in the photoinitiating efficiencies of cationic polymerization.
二氟硼 β-二酮染料被报道具有优异的光物理性质（例如，宽吸收和大消光系数），并且有可能在阳离子光聚合（CP）中作为高性能光引发剂。在这项研究中，制备了四种基于姜黄素的二氟硼染料（BF Curs）。研究了它们在黄色和红色 LED 下与碘鎓盐结合引发环氧化物或乙烯基醚 CP 的能力。一些基于 BF Curs 的光引发体系的效率比报道的蒽醌衍生物油蓝 N（OBN）高得多。发现 BF Curs 的分子结构在阳离子聚合的光引发效率中起着关键作用。
