Alkyltin Keggin Clusters Templated by Sodium

A new molybdenum-oxide-based organic-inorganic hybrid framework templated by double-Keggin anions.

A new double-Keggin-ion-templated, molybdenum-oxide-based organic-inorganic hybrid compound has been hydrothermally synthesized and its electrocatalytic properties investigated.

Reversible capping/uncapping of phosphorous-centered Keggin-type polyoxoniobate clusters.

Caps in α-Keggin-type polyoxometalates [PM2Nb12O40](9-) (M: Nb[double bond, length as m-dash]O or V[double bond, length as m-dash]O) can be removed in basic condition to produce uncapped [PNb12O40](15-). Transmetalation or capping occurs from the reaction of [PNb14O42](9-) or [PNb12O40](15-) with either Sb2O3 or V2O5 to form [PSb2Nb12O40](9-) or [PV2Nb12O42](9-), respectively.

Catalytic consequences of composition in polyoxometalate clusters with Keggin structure.

Mechanistic consequences of composition in acid catalysis by polyoxometalate keggin clusters.

The kinetics and mechanism of ether and alkanol cleavage reactions on Brønsted acid catalysts based on polyoxometalate (POM) clusters are described in terms of the identity and dynamics of elementary steps and the stability of the transition states involved. Measured rates and theoretical calculations show that the energies of cationic transition states and intermediates depend on the propertie...

Effects of support on bifunctional methanol oxidation pathways catalyzed by polyoxometallate Keggin clusters

H5PV2Mo10O40 polyoxometallate Keggin clusters supported on ZrO2, TiO2, SiO2, and Al2O3 are effective catalysts for CH3OH oxidation reactions to form HCHO, methyl formate (MF), and dimethoxymethane (DMM). Rates and selectivities and the structure of supported clusters depend on the surface properties of the oxide supports. Raman spectroscopy showed that Keggin structures remained essentially int...