Abstract
Keggin-type Cs salt of Mn (II)-substituted mono-lacunary phosphotungstate supported on mesoporous silica, a novel catalyst exhibited excellent activity towards solvent free oxidation reactions. The catalyst materials were fully characterized by different techniques including XRD, BET analysis, TG–DTA, Raman spectra, FT-IR and XPS. While XPS study shown the presence of Mn (II) on the material, the existence of Keggin structure even after modification was confirmed by XRD and FT-IR data. Excellent conversion and selectivity were achieved in selective oxidation of benzyl alcohol to benzaldehyde. Optimum reaction conditions were established with respect to various parameters that influence the selective oxidation.
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