Sulfonyl-bridged (copper-immobilized nickel ferrite) with activated montmorillonite, [(NiFe₂O₄@Cu)SO₂(MMT)]: a new class of magnetically separable clay nanocomposite systems towards Hantzsch synthesis of coumarin-based 1,4-dihydropyridines.

ABSTRACT: In this study, the synthesis of a new class of magnetic clay-based nanocomposites by bridging of sulfonyl groups between copper-immobilized nickel ferrite (NiFe₂O₄@Cu) and activated montmorillonite is described. Synthesis of the clay nanocatalyst was carried out via the activation of montmorillonite by ClSO₃H to afford sulfonated montmorillonite. The modified montmorillonite was then reacted with copper-layered nickel ferrite to afford the magnetic clay nanocomposite [(NiFe₂O₄@Cu)SO₂(MMT)]. Next, the characterization of porous materials was carried out using scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller and vibrati

SUBMITTER: Zeynizadeh B 

PROVIDER: S-EPMC9061266 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature