The core-shell of Fe 3 O 4 @SiO 2 modified by epichlorohydrin and 1-methyl-imidazole (Fe 3 O 4 @SiO 2-EPIM), a new green recyclable nanocatalyst, was designed and prepared. This nanocatalyst was characterized using fourier-transform infrared spectroscopy (FT-IR), field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS), elemental mapping technique, transmission electron microscopy (TEM), X-ray diffraction (XRD) techniques, thermal gravimetric analysis (TGA), N 2 adsorption-desorption by Brunauer-Emmet-Teller (BET) and vibrating sample magnetometer (VSM). The catalytic activity of Fe 3 O 4 @SiO 2-EPIM was assessed for synthesis of trisubstituted imidazoles via one-pot condensation reactions of benzil, aldehyde and ammonium acetate under the optimal reaction condition (PEG 200, 100°C, 0.02 g catalyst). This nanocatalyst displayed remarkable superiorities, such as environmental friendliness, shorter reaction time, excellent yields, reusability of the catalyst and simple workup procedure.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.