Preparation and characterization of magnetic Fe۳O۴ nanoparticles supported-molybdate sulfuric acid as a recyclable catalyst for the synthesis of substituted coumarins

Magnetic Fe۳O۴ nanoparticle-supported molybdate sulfuric acid (MNPs-MSA) was synthesized and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). The catalytic activity of MNPs-MSA was investigated as a recoverable catalyst for the one-pot synthesis of novel substituted coumarins in high to excellent yield at room temperature under solvent -free conditions. The magnetic nanocatalyst can be readily recovered easily by applying an external magnet device and reused for at least ۱۰ reaction runs without considerable loss of reactivity

Keywords:

Magnetic Fe۳O۴ nanoparticle-supported molybdate sulfuric acid (Fe۳O۴@MSA-NPs) , novel substituted coumarins , Solvent free conditions , recoverable catalyst