The research progress and prospects in polyoxometalate chemistry

On the basis of introduction of the properties and application fields of polyoxometalates (POMs), a review has been mainly given to the new development of POM chemistry at the aspects of synthesis and catalysis. The concrete contents mainly include: heteropolyniobates, K-12[Ti2O2] [SiNb12O40] . 16H(2)O, which contains one-dimensional (1D) chains constructed by [TiO2](4+) and silicododecaniobate Keggin anions [SiNb12O40](16-), and Na-14[H2Si4Nb16O56] . 45. 5H(2)O, a new POM structure type, obtained by hydrothermal synthesis. method, and Silverton type [GdMo12O42](9-) polyanion and a novel 3D framework formed by Silverton type [GdMo12O42](9-) anions and nine coordinated Gd-III cations; hybrid molecular dumbbells consisting of bridging POM clusters with an organic pi-conjugated rod; an unusual mixed-valence Mo-VI-Mo-VI-Fe-III compound containing discrete {Mo-VI (Mo-VI)(5)}(12) {Mo-6(V) Fe-24(III)}-type Keplerate clusters and their ID linking by a novel type of solid-state reaction at room temperature to form chains, (Necklace-type); synthesis Of Mo-368 cluster with a protein size; preparation of organic-inorganic nanoparticles gamma-SiW10-Au bonded with organic -SH group; starlike nanostructures of POMs, K-3[PMo12O40] . nH(2)O synthesized and assembled by an inverse microemulsion method; a breathing ionic crystal displaying selective binding of small alcohols and nitriles, K-3[Cr3O (OOCH)(6) (H2O)(3)] [alpha-SiW12O40] . 16H(2)O; activation of nitrous oxide and selective epoxidation of alkenes catalyzed by the manganese-substituted POM, [(Mn2ZnW)-Zn-III(Zn2W9O34)(2)](10-); selective oxidative-catalysis of H5PV2Mo10O40 in the PEG system; POM-catalyzed synthesis of propylene oxide in supercritical carbon dioxide system; preparation of highly active nano-composite film and three-dimension order macropore materials, and their function on the photodegradation of nitrogen-containing dyes and other organic pollutants; modification of surface for silicon dioxide and its interfacial coordination state with substituted type POMS. In addition, eight typical industrialized projects involving POM catalysts, three catalyst types of solid POM and several reaction fields during catalysis processes are summarized. This paper also includes the analyses of researching actuality for POM chemistry in china and prospects for them.