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A green and facile precipitation method was developed for the preparation of Zn 2 SnO 4  nano-particles in an orange peel (from north Iran) waste extract medium. The as-prepared and calcined samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), and UV–vis, photoluminescence (PL) and diffuse reflectance spectroscopy (DRS). The catalytic potential of the fresh sample of Zn 2 SnO 4  nano-particles was examined on the four-component reaction of 2-hydroxynaphthalene-1,4-dione, 2-aminoaniline, 2-aminopyridine/pyrazin-2-amine, and  N -methyl-4-piperidone/aromatic aldehydes under ultrasonic irradiation (US) condition leads to the preparation of some phenazine derivatives.

The Preparation of a Library of Fused Nitrogen Heterocyclic Compounds Catalyzed by Zn 2 SnO 4 Nanoparticles