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چکیده
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In this work, a green method was suggested for the synthesis of ZnFe2O4 magnetic nanoparticles (MNPs) as a novel heterogeneous catalytic support in order to immobilize the homogeneous complexes. In this sense, the study aims at immobilizing L-Arginine-Ni complex on the surface of ZnFe2O4 MNPs. L-Arginine-Ni which was immobilized on ZnFe2O MNPs surface by a simple, fast, and convenient route. The structure and composition of the prepared ZnFe2O4@L-Arginine-Ni MNPs were completely characterized by XRD, EDX, SEM, X-ray mapping and TGA and VSM techniques. Besides, it was applied as a green nanocatalyst for 5-substituted 1H-tetrazole derivatives and Oxidation of sulfides reactions under green conditions. The ZnFe2O4@L-Arginine–Ni MNPs offer several advantages i.e. simple synthesis method under green conditions, thermal and chemical stability during organic reactions, short reaction times, high yields of the products, excellent selectivity and easy work-up procedure. Moreover, the recycled nanocatalyst was reused for at least five cycles with no significant loss of its activity. Hot filtration test indicated heterogeneous catalysis for both of the mentioned reactions. This work is useful for the development and application of the magnetically recoverable Ni nanocatalyst on the basis of green chemistry principles.
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