Surface modification of silica-coated on the magnetic nanoparticles with covalently immobilized between imidazolium cation and silane groups for potential application as a green catalyst

Abstract

The objective of this work is producing a magnetic green Nano catalyst for production of coumarins derivatives by solvent-free protocol. In this research, surface modification silica-coated on the magnetic nanoparticles with covalently immobilized between the imidazolium cation and the 3-chloropropyltrimethoxysilane linker groups. The structure of the catalyst was characterized by XRD, FT-IR, TGA, VSM and SEM. The Fe3O4@SiO2-IM nanoparticle has been used to be an efficient green Nano catalyst for produce of coumarin derivatives by solvent-free protocol. This catalyst is a suitable, owing to its non-toxicity, low-cost and eco-friendly properties. Also, this catalyst can be recovered simply using an external magnetic field. The catalyst was reused several times without losing its catalytic activity.