Preparation, Characterization and Application of a Novel Organic-Inorganic Hybrid Magnetic Nanomaterial as a Highly Efficient Catalyst for the Synthesis of Bis-Coumarins, By Abdolkarim Zare

Research

Title	Preparation, Characterization and Application of a Novel Organic-Inorganic Hybrid Magnetic Nanomaterial as a Highly Efficient Catalyst for the Synthesis of Bis-Coumarins
Type	Article
Keywords	Organic-inorganic hybrid magnetic nanomaterial, Nano-[Fe3O4@SiO2@R-NMe2][FeCl4] (nano-[FSRN][FeCl4]), Dual-functional catalyst, Bis-coumarin, Solvent-free
Journal	Iranian Journal of Catalysis
DOI	10.30495/ijc.2022.688895
Researchers	Marziyeh Barzegar (First researcher) , Abdolkarim Zare (Second researcher) , Aysoda Ghobadpoor (Third researcher) , Manije Dianat (Fourth researcher)

Abstract

A novel organic-inorganic hybrid magnetic nanomaterial, namely nano-[Fe3O4@SiO2@R-NMe2][FeCl4] (nano-[FSRN][FeCl4]) was prepared, and characterized by EDX, elemental mapping, FE-SEM, FT-IR, XRD, VSM, TG and DTG analyses. Then, it was applied as a highly efficient and magnetically recyclable catalyst for the solvent-free synthesis of bis-coumarins from 4-hydroxycoumarin (2 eq.) and arylaldehydes (1 eq.). NMe2 is a basic group, and FeCl4â is a Lewis acid; thus, nano-[FSRN][FeCl4] can act as a dual-functional catalyst; based on this and the literature, a plausible mechanism was proposed for the reaction. Highlights