A hybrid mesoporous SBA-15 material (2a) containing an oxodiperoxo tungsten complex of the type [WO(O-2)(2)L] (L=pyrazolylpyridine) was synthesized by a post-grafting route. The organic-inorganic hybrid catalyst was characterized by means of XRD, N-2 adsorption-desorption and FT-IR. The catalytic property of 2a in the epoxidation of cyclooctene with H2O2 as the oxidant was investigated in comparison with other three kinds of hybrid tungsten containing SBA-15 materials bearing ethylenediamine, imidazole or 4,4'-bipyridine ligands. It was found that all oxodiperoxo tungsten catalysts were active at the reaction temperature of 55 degrees C with CH3CN as solvent. However. only the catalyst with the pyrazolylpyridine ligand showed good recoverability and relatively high stability against leaching of active tungsten species. Moreover, this catalyst showed very high efficiency for H2O2 utilization, and its catalytic activity could be further improved by using solvent mixtures of CH3CN and CH3COOH. (C) 2009 Elsevier B.V. All rights reserved.