摘要
本文通过对苝酐进行化学修饰,合成了两种具有较好溶解性和强可见光吸收的苝衍生物:PMI-(iPr)2An(PSⅡ)和PMI-((iPr)2An)2(PSⅢ)。在可见光照射下,以PSⅡ和PSⅢ作为光敏剂,氧气为氧化剂,实现了高转化率和高选择性的硫醚到亚砜的氧化。在优化反应条件下,PSⅢ对苯基硫醚衍生物光催化氧化的转化率和选择性均接近100%。活性中间体的清除实验和电子顺磁共振实验表明,该体系中单重态氧(~1O_2)和超氧自由基同时对硫醚的氧化起作用。
PMI-（iPr）2An（PSⅡ）and PMI-（（iPr）2An）2（PSⅢ））with strong visible light absorption and good solubility are successfully synthesized through the chemically modifications of Perylene-3,4,9,10-tetracarboxylicdianhydride.Under visible light irradiation,sulfides are transformed to sulfoxides with relatively high selectivity and yield,in which PSⅡ or PSⅢact as the photosensitizer and oxygen plays the role of oxidant.Under optimized conditions,both the yield and selectivity can reach up to 100% for sulfides oxidation by using PSⅢ as the photosensitizer. Active species trapping experiments and electron spin resonance（ESR）demonstrate that the singlet oxygen and superoxide radical anion are the effective oxidants during the photocatalyticreaction.
出处
《影像科学与光化学》
CAS
CSCD
北大核心
2017年第5期675-685,共11页
Imaging Science and Photochemistry
基金
国家自然科学基金项目(21371175)资助
关键词
苝衍生物
光催化
硫醚氧化
单线态氧
超氧自由基
perylene derivative
photocatalysis
sulfides oxidation
singlet oxygen
superoxide radical anion
