Epoxidation reaction catalyzed heterogeneously by Mn complex -polyoxometalate compound

Organoimido substituted POMs as valuable building blocks can construct novel nanostructured organic–inorganic hybrid molecular materials in well-developed common organic synthesis methods, such as Pd-catalyzed carbon–carbon coupling , esterification and epoxidation. Nowadays, inorganic–organic hybrid materials based on polyoxometalates (POMs) are extensively attracted because of theirpotential applications in catalysis, gas storage, magnetism, photochemistry and electrochemistry [1-5]. Their features of an oxygen-rich surface, high charge density and controllable size mean POMs are becoming popular inorganic building blocks. A hybrid complex based on covalent interaction between of 1, 2-bis (p-aminophenylthio) ethane (BAPTE), and a Lindqvist type polyoxometalate, Mo6O19 2−, was prepared. This new hybrid catalyst, Mn (II) complex -POM, was characterized by 1H NMR, FT- IR, and UV-Vis spectroscopic methods and cyclic voltammetry. The catalytic activity of Mn(II) complex -POM hybrid material was investigated for epoxidation reaction were produced in good to excellent yield. The reusability of this catalyst was also investigated.