novel magnetic nanoparticle acid catalyst for synthesis of a facile, efficient and one-pot tri substituted imidazoles

Modified nanomagnetic acid catalyst sio2/fe3o4/so3h was synthesized in simple method and used for synthesizing 2,4,5tri substituted imidazole by combining three components such as benzil, aldehydes and ammonium acetate of which the last component was as an ammonia source. high yield of trisubstituted imidazole without significant loss of efficiency and easy recovery by an external magnetic field and several times of reusability with less deterioration are advantages of sio2/fe3o4/so3h catalyst. a large amount of acid existing on the surface of the magnetic layer leads to more activities of the catalyst and as a result, the yielding of trisubstituted imidazole increases. the acidic functioned nanomagnetic coreshell catalyst was approved as per fourier transfer infrared (ftir), xray diffraction powder (xrd), energy dispersive xray spectroscopy (eds), thermal gravimetric analysis (tga), vibrating sample magnetometer (vsm) and transmission electron microscopy (tem).