具有Keggin结构—取代过氧型杂多配合物及其几何异构体的合成、表征及催化活性的研究

SYNTHEISIS, CHARACTERIZATION AND OXIDATION ACTIVITY OF PEROXOTITANIUM MONO-SUBSTITUTED HETEROPOLYTUNGSTATES AND THEIR ISOMERIDEWITH KEGGIN STRUCTURE

采用立体有择法合合成了具有 Kaggin结构的过氧型杂多配合物 :α-M6- m Hm[Si W11Ti O4 0 ]·x H2 O,α-M6- m Hm[Si W11( Ti O2 ) O3 9]· x H2 O和βi-M6- m Hm[Si W11( Ti O2 ) O3 9)· x H2 O.( m=K、TBA;i=1 ,2 ,3 ) ;用 IR、UV、极谱—循环伏安、183 WNMR等测试方法对其性质、结构进行研究 .结果表明 :它们都是具有 Keggin结构的过氧杂多配合物 ,它们对顺丁烯二酸的 H2 O2 环氧化反应具有显著的催化活性 .

In this paper heteropoly complenes of peroxotitanium mono-substituted with keggin structure were synthesized by the cubic selective method:α-M 6- m H m [SiW 11 TiO 40 ]· x H 2O,α-M 6- m H m [SiW 11 (TiO 2)O 39 ]· x H 2O and β i -M 6- m H m [SiW 11 (TiO 2)O 39 ]· x H 2O ( M =K,TBA; i =1,2,3,);They were characterized by IR and UV spectroscopy ,polargraphy and cyclic voltammetric and 183 WNMR. The experimental results indicate that they are all the Keggin stracture. They had highacivity for the epoxidation of Maleic acid using H 2O 2 oxidation.