Selective oxidation of sulfides and synthesis of 5-substituted 1H-tetrazoles on Ce (III) immobilized CoFe2O4 as a magnetically separable, highly active, and reusable nanocatalyst

Reactions of CoFe2O4 magnetic nanoparticles supported ligands, 2-amino-2-methyl-1,3-propanediol (Amino glycol), with cerium salts provided the respective anchored complex CoFe2O4 @Amino glycol/Ce. The nanocatalyst was characterized perfectly using thermogravimetric analyses, FT-IR spectroscopy, scanning electron microscopy, energy-dispersive X-ray inductively coupled plasma optical emission spectroscopy vibrational sample magnetometry and powder X-ray diffraction. CoFe2O4 magnetic nanoparticles supported ligands with cerium salts afforded active catalysts for the synthesis of 5-substituted 1H-tetrazoles and oxidation of sulfides at mild reaction conditions in the green medium under optimized conditions. The ligand and metal atom identity influenced the catalytic activity of the nanocatalyst. The immobilized complexes were easily collected via an external magnetic field and further reused at least 6 times without significant loss of catalytic activity and selectivity.

Automated summary

This study investigated the reactions of CoFe2O4 magnetic nanoparticles supported ligands with cerium salts, and characterized the resulting nanocatalyst using various methods. The catalyst showed good activity and selectivity for the synthesis of 1H-tetrazoles and oxidation of sulfides under mild reaction conditions in a green medium. The immobilized complexes could be easily collected via an external magnetic field and reused multiple times without significant loss of catalytic activity and selectivity.