Trisaminomethane–cobalt complex supported on Fe₃O₄ magnetic nanoparticles as an efficient recoverable nanocatalyst for oxidation of sulfides and C–S coupling reactions

Abstract

In this work, trisaminomethane–cobalt complex immobilized onto the surface of Fe3O4 magnetic nanoparticles was successfully prepared via a simple and inexpensive procedure. The prepared nanocatalyst was considered a robust and clean nanoreactor catalyst for the oxidation and synthesis of sulfides under green conditions. This ecofriendly heterogeneous catalyst was characterized by Fourier transform infrared spectroscopy, X‐ray diffractometry, energy‐dispersive X‐ray spectroscopy, inductively coupled plasma‐atomic emission spectroscopy, thermogravimetric analysis, vibrating sample magnetometry, X‐ray mapping, scanning electron microscopy, and transmission electron microscopy techniques. Use of green medium, easy separation and workup, excellent reusability of the nanocatalyst, and short reaction time are some outstanding advantages of this method.

Efficient Construction of Symmetrical Diaryl Sulfides via a Supported Pd Nanocatalyst-Catalyzed C-S Coupling Reaction

“…Therefore, the use of green sulfur sources to develop novel, practical and efficient methods for the construction of sulfides is demanding. After years of research, a variety of green sulfur sources, including thiourea [ 18 , 19 ], sodium sulfide [ 20 , 21 ], thioacetamide [ 22 ], thiocyanate [ 23 , 24 ], carbon disulfide [ 25 ] and elemental sulfur [ 26 , 27 ] have been successfully used in the synthesis of symmetrical diaryl sulfides via transition metal-catalyzed C-S coupling reactions.…”

A magnetic nano-sorbent incorporating antimicrobial papain for the rapid and efficient removal of levofloxacin and Pb(ii) from aqueous systems

“…Three distinct aforementioned mass losses could result from the elimination of surface hydroxyl groups and free adsorbed solvent (alcohol and toluene) molecules located in the SiO 2 layer, as well as the decomposition of the organic structures (CPTMS and papain) grafted on the SiO 2 shell of the Fe 3 O 4 @SiO 2 nanoparticles. 32,33 These outcomes support the successful grafting of organic groups onto Fe 3 O 4 @SiO 2 MNPs.…”

Synthesis and characterization of silica-coated oil-in-water (O/W) magnetic emulsion

“…Initially, there was a weight loss of approximately 5.2% below 300°C associated with the degradation of TEOS and SDS at 120-140°C and 240°C, respectively. The degradation of oleic acid in Si-MN nanoparticles takes place between 250-300 °C [53]. PVP degrades at temperature between 400-450 °C [54].…”