آتنا نعیمی

In this work, first, boehmite nanoparticles were prepared by an eco nomical and simple method using accessible materials, and func tionalized with 3-chloropropyltrimethoxysilane (3-CPTMS). Then, a nickel(II) unsymmetrical salen Schiff base complex, Ni(salenac OH), where salenac-OH = [9-(2’,4’-dihydroxyphenyl)−5,8-diaza-4 methylnona-2,4,8-trienato](−2), was synthesized and immobilized on the prepared chloro-functionalized boehmite nanoparticles. The obtained Boehmite@Ni(salenac-OH) nanoparticles were character ized using various techniques. The produced Boehmite@Ni(salenac OH) nanoparticles were employed as an effective heterogeneous nanocatalyst for the selective oxidation of sulfides to sulfoxides using 30% H2O2 as a green oxidant under solvent-free conditions as well as the oxidative coupling of thiols to disulfides with 30% H2O2 inethanol at room temperature (25 °C). In these protocols, the desired sulfoxides and disulfides were achieved with good to excel lent yields without over-oxidation to unwanted by-products. The use of this heterogeneous nanocatalyst in the mentioned organic reaction achieved good results, including high efficiency, excellent stability, easy recovery, and reusability of the catalyst for five contin uouscycles. In addition, XRD andFT-IRtechniquesindicatedthatthe structure of the catalyst remained intact after the recovery process.