Aiming to overcome the disadvantages of small molecule photosensitizers, a novel macromolecular photosensitizer was designed and synthesized in this work. Firstly, the functional small molecule photosensitizer 9-oxo-9H-thioxanthene-2-carboxylic acid (TX-COOH) and precursor poly(2-hydroxyethyl methacrylate) (PHEMA) was individually synthesized. Then, the macromolecular photosensitizer PHEMA-TX was realized by an optimized reaction procedure between PHEMA and TX-COCl, which was previously prepared by acyl chlorination of TX-COOH. The modification efficiency was calculated as 64%. Finally, the photocatalytic reaction using the as-synthesized PHEMA-TX was investigated based on three substrates of tris(4-methoxyphenyl)phosphane, methyl(phenyl)sulfane, (4-methoxyphenyl)boronic acid. The results showed that the photocatalyst PHEMA-TX can be easily separated, recovered by a simple precipitation, and reused 7 times without significant loss of the catalytic activity. The excellent photocatalytic property, easy separation, and recyclability of PHEMA-TX were comprehensively confirmed, which contributed great potential of this novel macromolecular photosensitizer in future application.

为了克服小分子光敏剂的缺点，设计并合成了一种新型的大分子光敏剂。首先，分别合成了功能性小分子光敏剂9-氧代-9H-噻吨-2-羧酸（TX-COOH）和前体聚（甲基丙烯酸2-羟乙酯）（PHEMA）。然后，通过优化PHEMA与TX-COCl之间的反应程序来实现大分子光敏剂PHEMA-TX，该反应程序先前是通过TX-COOH的酰基氯化制备的。改性效率计算为64％。最后，基于三（4-甲氧基苯基）膦，甲基（苯基）硫烷，（4-甲氧基苯基）硼酸的三种底物，研究了使用合成后的PHEMA-TX的光催化反应。结果表明，光催化剂PHEMA-TX可以容易地分离，通过简单的沉淀回收并可以重复使用7次而不会显着降低催化活性。全面确认了PHEMA-TX的优异的光催化性能，易分离性和可回收性，这为该新型高分子光敏剂在未来的应用中发挥了巨大的潜力。