Synthesis of Fe3O4@SiO2@DOPisatin‐Ni(II) and Cu(II) nanoparticles: Highly efficient catalyst for the synthesis of sulfoxides and disulfides

• Published in: Applied organometallic chemistry 2017-12, Vol.31 (12), p.n/a
• Main Authors: Hajjami, Maryam, Sharifirad, Fatemeh, Gholamian, Fatemeh
• Format: Article
• Language: English
• Subjects: Absorption spectroscopy; Atomic absorption analysis; Atomic beam spectroscopy; Catalysis; Catalysts; Catalytic activity; Chemical properties; Chemical synthesis; Chemistry; Disulfides; Electron microscopy; Fe3O4@SiO2@DOPisatin‐M(II); Fourier transforms; Hydrogen peroxide; Infrared analysis; Infrared spectroscopy; Iron oxides; Nickel; Nuclear electric power generation; Oxidation; oxidative coupling; Scanning electron microscopy; Silicon dioxide; Spectrum analysis; Substrates; Sulfoxides; Thermogravimetric analysis; Thiols; X-ray diffraction; X-ray spectroscopy
• ISSN: 0268-2605; 1099-0739
• DOI: 10.1002/aoc.3844

The catalytic activity of two magnetic catalysts Fe3O4@SiO2@DOPisatin‐M(II) (M = Ni, Cu) was investigated in the environmentally green H2O2 oxidant‐based oxidation of sulfides to sulfoxides and oxidative coupling of thiols to disulfides. By using these catalysts, various substrates were successfully converted into their corresponding product. These catalysts could also be reused multiple time without significant loss of activity. The physical and chemical properties of the catalysts were determined using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT‐IR), X‐ray diffraction (XRD), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), energy dispersive X‐ray spectroscopy (EDX) and atomic absorption spectroscopy (AAS). The catalytic activity of two magnetically catalyst Fe3O4@SiO2@DOPisatin‐Ni (II) and Fe3O4@SiO2@DOPisatin‐Cu (II) was investigated in the oxidation of sulfides to sulfoxides and oxidative coupling of thiols to disulfides. These catalysts also could be recycled consecutively several times without significant loss of activity. The physical and chemical properties of the catalysts were charecterised using XRD, SEM, EDX, TGA, VSM and FT‐IR spectroscopy.