Synthesis and characterization of cis-WO2(acac)2 complex to nanoporous functionalized MCM-41 as selective catalyst for epoxidation of cyclooctene

Aminopropyl modi fied MCM-41 was prepared by cova lent grafting of mesoporous MCM-41 with 3-aminopropyl trimethoxysilane. Reaction of this material with 2-(Diphenyl phosphino)benzaldehyde and subsequent complexation with bis(acetylacetonato)dioxotungsten ( VI ) (WO2(acac)2leads to prepare WO2 (acac)diphalAmpMCM-41 heterogeneous catalyst with tungsten loading of 1.8wt%. Characterization of these materials was carried out with FT-IR, powder X-ray diffraction (XRD), nitrogen adsorption-desorption (BET) and Inductive coupling plasma (ICP) methods. The XRD and BET analyses revealed that textural properties of support were preserved during the prepration of catalyst. The resultant material successfully catalyzed the epoxidation of cyclooctene with hydrogen peroxide (H2o2) to the corresponding epoxides with 100% selectivity.

کلیدواژه ها:

Tungsten ، MCM-41 ، Heterogeneous catalyst ، Immobilization ، Epoxidation