مشخصات پژوهش

In this paper, new chitosan (CS) coatedmagnetic iron oxide nanoparticles (MNPs) supported manganese Schiffbase complex was designed, synthesized and screened as an efficient, reusable nanocatalyst by the threecomponent reaction of various aldehyde derivatives with trimethylsilyl cyanide and 2-aminopyridine for the synthesis of 3-iminoaryl-imidazo[1,2-a]pyridine (IAIP) derivatives. Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), vibrating sample magnetometry (VSM) and inductively coupled plasma atomic emission spectroscopy (ICP-AES) have been used to characterize the nanocatalyst before reaction. For the first time, earlier than immobilizing of manganese complex, the chitosan-coated Fe3O4 nanoparticles prepared through covalent bond formation between CS and chlorosilane-modified MNPs which were treated with triethylamine. It is a promising nanocatalyst providing high yield, short reaction times, and excellent turnover number. The recycle studies show a significant loss of activity after recycling six times.