Polyethyleneimine-modified super paramagnetic Fe3O4 nanoparticles: An efficient, reusable and water tolerance nanocatalyst.

Journal of Chemical Reactivity and Synthesis

مقاله 4، دوره 1، شماره 3، مرداد 2011، صفحه 22-34   

نوع مقاله: Research Article

نویسندگان

Hosein Hamadi^{* 1}؛ Maryam Gholami¹؛ Mehdi Khoobi²

¹Department of Chemistry, College of Science, Shahid Chamran University, Ahvaz, Iran

²Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran

چکیده

A novel magnetically immobilized polyethyleneimine (PEI) fabricated by covalently anchoring on silica coated Fe₃O₄ nanoparticles (PEI@Si-MNPs) was prepared. The synthesized catalyst was characterized by Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). The immobilized PEI was shown to be an efficient heterogeneous catalyst for the synthesis of spiro-oxindole, benzopyranes and chromene derivatives via multi-component reaction (MCR), in water as a green solvent. The catalyst is readily recovered by simple magnetic decantation and can be recycled several times with no significant loss of catalytic activity

کلیدواژه‌ها

Polyethyleneimine (PEI)؛ Magnetic Nanoparticle؛ benzopyranes؛ Surface functionalization