Mono-lacunary PrIII-Polyoxotungstate: Epoxidation of Alkenes with Unusual Selectivity  

作　　者：杨峰 马莉 马致媛 

机构地区：[1]Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry & Chemical Engineering of Guangxi Normal University

出　　处：《Chinese Journal of Structural Chemistry》2011年第8期1183-1188,共6页结构化学（英文）

基　　金：Supported by the National Natural Science Foundation of China (No. 31060121)

摘　　要：The utilization of polyoxometalates （POMs） or their derivatives as homogeneous or heterogeneous catalysts in alkene epoxidation is a subject of considerable research activity[1]. The limitation to the use of POMs in these catalytic reactions is either their relatively low selectivity in epoxide formation or applicability for a rather limited type of alkenes. Therefore, it would be beneficial if the catalysts bear high selectivity for epoxidation and are applicable for a rather wide variety of alkenes, which is desirable in industrial processes and also vital for the selection of an ideal catalyst[2]. In search for an efficient and practical epoxidation method to utilize aqueous H2O2 as terminal oxidant, we focus on the rare-earth complexes with lacunary POM ligands.The utilization of polyoxometalates （POMs） or their derivatives as homogeneous or heterogeneous catalysts in alkene epoxidation is a subject of considerable research activity[1]. The limitation to the use of POMs in these catalytic reactions is either their relatively low selectivity in epoxide formation or applicability for a rather limited type of alkenes. Therefore, it would be beneficial if the catalysts bear high selectivity for epoxidation and are applicable for a rather wide variety of alkenes, which is desirable in industrial processes and also vital for the selection of an ideal catalyst[2]. In search for an efficient and practical epoxidation method to utilize aqueous H2O2 as terminal oxidant, we focus on the rare-earth complexes with lacunary POM ligands.

关 键 词：EPOXIDATION homogeneous catalysis PRASEODYMIUM POLYOXOMETALATES 

分 类 号：O631.3[理学—高分子化学]