可聚合单组分硫杂蒽酮类光引发剂的合成及性能研究

硫杂蒽酮衍生物紫外吸收强、峰形宽、夺氢能力强，易于调控实现与 LED光源的匹配。本文制备了可聚合的含助引发剂叔胺的硫杂蒽酮类光引发剂，室温呈液态，可溶解范围宽。产物在 390~405 nm范围有较强吸收，摩尔消光系数达 10⁴相比硫杂蒽酮类市售商品，其最大紫外吸收峰红移 15~20 nm，且具有较快的分子内电荷转移，迁移率，由 17.6%降为 6.2%。光解性能研究表明其具有光漂白能力，与光固化单体和树脂相容性好。

Study on Synthesis and Properties of One-Component Polymerizable Thioxanthone Photoinitiator

Thioxanthone(TX)and its derivatives have broad application prospects for their excellent absorption properties in the near UV range,high hydrogen scavenging capacity and ease of adjusting with LED light source. Herein,the design and synthesis of an interesting one-component polymerizable TX bearing tertiary amine photoinitiator was reported,which is liquid at ambient temperature and displays excellent solubility in several solvents. It shows strong absorption in the wavelength range of 390-405 nm with molar extinction coefficient up to 10~4. Compared to the commercially available TX compounds,its maximum of absorption experiences a red shift of ca. 15-20 nm,indicating there exist a fast intermolecular charge transfer process,and the mobility decreased from 17. 6% to 6. 2%. The photolysis study shows it possess the ability for photobleaching. Our preliminary study demonstrates this TX compound has high photoinitiation efficiency and good compatibility with various monomers.