Chemistry Letters, Vol.34, No.2, 238-239, 2005
An efficient (PMo11VO404-)-O-V/silica material having cationic ammonium moiety: Synthesis, characterization, and catalytic performance for oxidation of alcohols with dioxygen
A novel method for grafting transition metal-substituted polyoxometalates (TMSP) onto a modified silica surface was found, Keggin-type vanadium(V)-substituted polyoxomolybdate, [(PMo11VO40)-O-V](4-) (PMoV), was electostatically anchored to a modified silica surface having cationic ammonium moiety. The PMoV-grafted silica material exhibited activities that were higher than those of homogeneous PMoV reactions for oxidation of various alcohols with 1-atm dioxygen in the presence of isobutyraldehyde (IBA).