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Abstract
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In this thesis, novel nano magnetic catalysts namely, Fe3O4@SiO2@Si(CH2)3@melamine@picolinealdehyde @SO3H, Fe3O4@SiO2@Si(CH2)3@DCC and Fe3O4@Ca(HSO4)2 designed and synthesized. The as-synthesized catalysts were fully characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and vibrating-sample magnetometer (VSM). Furthermore the functional groups on the surface of the as-synthesized catalysts were approved using infrared (FT-IR). Also, using thermal gravimetric analysis (TGA), derivative thermal gravimetric (DTG) and differential thermal analysis (DTA), the stability temperature of the as-synthesized catalyst were determined. These catalysts can also be recycled and used in a reaction several times with slight decrease of reaction yield. Following the synthesis and characterization of the as-synthesized catalysts by the mentioned methods, they were used in the multi-component reactions such as, synthesis of hexahydro quinolin, 2-amino-3-cyano pyridine and indazolo phetalazine derivatives. These N-heterocyclic compounds were synthesized with high yields and low reaction times. Also, the performance of Fe3O4@SiO2@Si(CH2)3@DCC as a nano-structure was evaluated in the chemical and biological water treatment. In another investigation, hexahydroquinoline derivatives were synthesized with very low reaction time and high yield using ZrOCl2.8H2O.
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