Abstract A series of new naphthyl-based acylphosphine oxides (N1–N3) have been designed and synthesized. The obtained compounds could be used in the photo-initiated free radical polymerization (FRP). The performances of N1–N3 in the FRP of trimethylolpropane triacrylate (TMPTA) and their UV–vis spectra were evaluated and compared with 2,4,6-trimethyl(phenyl)diphenyl oxide (TPO, a commercial photoinitiator). Results showed that N1–N3 possessed higher molar absorption coefficients and wider absorption wavelength than TPO. Under the same reaction conditions, N3 exhibited the best double bond conversion (DC) of TMPTA in the tested photoinitiators. Moreover, the calculated migration of N1–N3 of the solidified samples was 1/7, 1/3 and 1/23 of TPO, indicating the lower migration properties. Possible reasons of the performance of N1∼N3 were proposed.

中文翻译：

---

高效低迁移萘基酰基氧化膦光引发剂

摘要 设计并合成了一系列新的萘基酰基氧化膦（N1-N3）。所得化合物可用于光引发自由基聚合（FRP）。评估了 N1-N3 在三羟甲基丙烷三丙烯酸酯 (TMPTA) 的 FRP 中的性能及其紫外-可见光谱，并与 2,4,6-三甲基（苯基）二苯醚（TPO，一种商业光引发剂）进行了比较。结果表明，N1-N3 比 TPO 具有更高的摩尔吸收系数和更宽的吸收波长。在相同的反应条件下，N3 在测试的光引发剂中表现出最佳的 TMPTA 双键转化率 (DC)。此外，计算出的固化样品的 N1-N3 迁移量为 TPO 的 1/7、1/3 和 1/23，表明迁移性能较低。提出了N1∼N3性能的可能原因。