Brønsted 酸功能化有机高铼酸盐催化氧化硫醚的研究

摘要

采用新型 Brønsted 酸功能化有机高铼酸盐为催化剂、质量分数为30%的 H 2 O 2为氧化剂，对含硫化合物进行了催化氧化反应的研究。通过 FT-IR、NMR、TGA 等手段对这两种催化剂的组成结构和热稳定性进行了表征与分析，考察了不同溶剂、催化剂物质的量、反应温度、氧化剂物质的量、反应时间对转化率、亚砜产率和选择性的影响。所合成的有机高铼酸盐催化氧化硫醚生成亚砜的最佳反应条件为：催化剂物质的量为0.03 mol、H 2 O 2物质的量为2.4 mmol、反应温度为40℃、反应时间为90 min。按最佳反应条件进行反应，主产物亚砜产率和选择性都可以达到95%以上。%A series of novel Brønsted acidic organic perrhenates were applied as catalysts for sulfide oxidations using 30%H 2 O 2 as oxidant.The structures and thermal stability data of the catalysts were characterized by FT-IR,NMR and TGA. Meanwhile,the effect of various solvents,the dosage of H 2 O 2 and catalyst,temperature and the reaction time on the catalytic performance was studied in details.The results indicate that the selectivity and yield of sulfoxide can reach up to 95% under the optimal conditions,in which the dosage of catalyst is 0.03 mol,the dosage of H 2 O 2 is 2.4 mmol,40 ℃ and 90 min.