Dioxomolybdenum(VI) Schiff base complex supported on magnetic nanoparticles as a green nanocatalysis in epoxidation of olefins

Fe3O4 nanoparticles were prepared by the co-precipitation methodand silica was then coated on the magnetic nanoparticles followed by modification with (3-aminopropyl) trimethoxysilane. Then dioxomolybdenum(VI) Schiff base complex of N,N′-bis(5-chloromethyl-salicylidine)-1,2-phenylenediamine)] was immobilized on the surface ofmagnetic nanoparticles as a heterogeneous catalyst. The catalyst identified by scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM), X-ray diffraction, IR spectroscopy, diffuse reflectance spectra and atomic absorption spectroscopy techniques.The catalyst shows excellent catalytic activity in epoxidation of olefins using tert-butylhydroperoxide in 1,2-dichloroethane.In this report the supported complex exhibited 100% selectivity for epoxidation with 100% conversion for cyclooctene. Nanocatalyst can be easily recovered by a magnetic field and reused for subsequent reactions for at least 5 times with less deterioration in catalytic activity.

کلیدواژه ها:

Dioxomolybdenum(VI) ، Epoxidation ، Nanocatalysis ، Nanoparticles ، Schiff base