作　　者： ; ; ;

机构地区： 遵义医学院珠海校区

出　　处： 《遵义医学院学报》 2005年第6期515-516,520,共3页

摘　　要： 目的研究4种N,N′-二(取代亚水杨基)-2,6-吡啶二氨合钒氧(Ⅱ)席夫碱配合物催化苯乙烯环氧化反应的催化活性。方法 N2保护下,H2O2为氧源,VO(Ⅱ)席夫碱配合物为催化剂,25℃下苯乙烯发生环氧化反应;气相色谱法分离环氧化反应产物,标准样品定性、内标法定量测定。结果产物中有环氧化产物苯基环氧乙烷,催化剂苯环上有取代基的环氧化物产量高,取代基在5-位上的比在3-位上的环氧化物产量高。结论 VO(Ⅱ) 席夫碱配合物具有催化苯乙烯环氧化反应的催化活性;催化剂苯环上有取代基,对反应的活性和选择性有明显的影响、配体的空间构型对反应也有重要影响。 Objective To study the catalytic activity of four Schiff base complexes, vanadyl N, N＇-bis-（ substitutional- salicylidene） -2,6-pyridinediamine, during the process of the epoxidation of styrene. Methods At 25℃, under the atmosphere of nitrogen, peroxide of hydrogen offering oxygen, and vanadyl Schiff base complexes as catalyzer, the styrene undergone the epoxidation reaction. Then the oxidation products were determined by gas chromatography, qualitatively analysed by correspond standard material, and quantified by the internal standard method. Results We obtained the epoxidation products of phenyl epoxy ethane. That with substltuent on the benzene ring has higher yield, and that the substituent at 5- have higher yield than at 3-. Conclusions Vanadyl Sehiff base complexes have the catalytic activity in the reaction of epoxidation of styrene. The substituent at benzene ring affect significantly the activity and selectivity of the reactions, and the spatial configuration of the ligands have important effect on the reactions.

关 键 词： 席夫碱配合物 催化活性 环氧化

领　　域： [理学] [理学]