Synthesis of Quinoxalines and Benzimidazole Derivatives by Citrate Sol-Gel Auto-combustion Synthesized CoFeMnO4 Nanoparticles.
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Abstract
Formation of manganese doped cobalt ferrite nanoparticles with the chemical composition CoFeMnO4 was synthesized by the citrate sol-gel auto combustion method. Thermal analysis of as prepared sample was carried out by TG-DTA. The crystal structure, morphological analysis and size of particle were investigated by using X-ray diffraction (XRD) study, Fourier Transform Infrared Spectrometer (FTIR) Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) techniques. Magnetic character of synthesized nanomaterials was investigated by Vibrating Sample Magnetometer (VSM) Study. The X-ray diffraction pattern confirms a single phase cubic spinel structure whereas, FT-IR study further supports spinel structure adopted by catalyst synthesized and TEM study reveals formation of nanosized material synthesized by method adopted. Elemental analysis as obtained by EDAX is in close agreement with the expected composition. VSM study reveals ferromagnetic nature of nanoparticles. Well characterized nanomaterials were used in the syntheses of medicinally important quinoxalines and benzimidazole derivatives and catalyst could be recycled up to five cycles with modest change in catalytic activity.