Fe₃O₄@nSiO₂@mSiO₂/DBU: A Novel and Effective Basic Magnetic Nanocatalyst in the Multicomponent One Pot Synthesis of Polyhydroacridines and Polyhydroquinolines

Abstract

In this research work, magnetic nanoparticles (NPs) of Fe₃O₄@nSiO₂@mSiO₂/DBU were designed as a novel effective heterogeneous catalyst for the production of polyhydroacridines and polyhydroquinolines. For characterizing the NPs, the Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscope (TEM), vibrating sample magnetometry (VSM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and N₂ adsorption–desorption measurement (BET isotherm) techniques were used. Some advantages of this magnetic nanoparticle include: use of commercially available materials to make catalysts, appropriate and simple operation, excellent yields, appropriate catalytic activity, simple work-up, and recycle and reuse the catalyst up to seven times without considerable change in its catalytic activity.

Graphical Abstract

Keywords:

• Fe3O4@nSiO2@mSiO2/DBU
• magnetic nanoparticle
• polyhydroacridines
• polyhydroquinolines

Acknowledgments

This work was supported by the research facilities of Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.