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چکیده
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In this research project, silica-modified ZnFe O magnetic nanoparticles were prepared in a simple, short, and straightforward way. Subsequently, an efficient catalyst through immobilization of ascorbic acid on the surface of silicacoated ZnFe O nanoparticles has been produced. The physical and chemical properties of ZnFe O @SiO -ascorbic acid were considered by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), and vibrating sample magnetometer (VSM) analyses. The catalytic activity of described magnetic nanocatalyst was checked out for the synthesis of chromeno[2,3-d] pyrimidine-8-amine and quinazolinone derivatives. The described catalyst was recovered and reused for five continuous cycles without considerable change in its catalytic activity.
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