Preparation and catalysis of porous silica supported metal Schiff-base complex

A series of porous silica support metal Schiff-base complexes was synthesiz ed with amino porous silica, salicylaldehyde and metal ion, which character ized by IR spectra, elemental analysis, and SEM. The catalytic property for oxidation of olefins in the presence of molecular oxygen has been investig ated. The major product of the aerobic oxidation without reductant was the epoxy. The influence of reaction temperature and additive for epoxidation h ad been studied. The selectivity and the conversion of epoxidation varied w ith reaction time, different additives and different catalysts. (C) 2000 El sevier Science B.V. All rights reserved.