LAUSR

In this study, organic–metal nanocatalyst was synthesized by reacting ferric(ΙΙ) chloride with organic phosphonate ligand. The particle size was controlled with the help of the surfactant. Nanoparticle structure was analyzed using Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), scanning electron microscopy (SEM), dispersive X-ray (EDX), Brunauer–Emmett–Teller (BET) isotherm and X-ray diffraction (XRD) spectra. Next, its catalytic activity was investigated in the synthesis of heterocyclic compounds (2,4,5-trisubstituted imidazoles derivatives). Under optimal conditions, the products were obtained with good efficiency and short time. Products identification were evaluated using physical data, FT-IR, 1 H and 13 CNMR analysis. The results show that the new method, namely the use of iron-phosphonate nanostructures, is effective for the synthesis of trisubstituted imidazole derivatives. This method has many advantages such as short reaction time, high yield, solvent free conditions, recyclability of the catalyst, and easy workup.