|Name||Mr. Preet Mahalay|
|Organization||University of Florida|
PREPARATION AND PROPERTIES OF NEW POLYOXOVANADATES
Preet Mahalay, Khalil A. Abboud and George Christou
Department of Chemistry, University of Florida, Gainesville FL-32611-7200, USA
Metal oxides are widely used in industry as heterogeneous catalysis for oxidation processes. Iso- and mixed-metal polyoxometalates are molecular species that can be considered soluble fragments of the metal-oxide lattice. Interest in the field of polyoxometalates is currently growing because of its applications in catalysis, zeolites, materials with striking electronic and magnetic properties, biological systems and sensors. Most polyoxovanadates have been synthesized from meta and orthovanadates, (Cat)VO3 or (Cat)3VO4 (Cat+ = NH4+, K+ or Na+), which have infinite chains of corner-sharing VO4 tetrahedra, under acidic aqueous conditions; the first such product was the decavanadate cluster [V10O28]6-. We will describe new types of synthetic schemes to various polyoxovanadates, highlighting their structural differences to the other reported clusters as well as the bulk V2O5 lattice. We will also discuss the data obtained from 51V- and 17O- NMR spectroscopy, cyclic voltammetry and EPR spectroscopy.