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Immobilizing palladium on melamine‐functionalized magnetic nanoparticles: An efficient and reusable phosphine‐free catalyst for Mizoroki–Heck reaction
Author(s) -
Aryanasab Fezzeh,
Shabanian Meisam,
Laoutid Fouad,
Vahabi Henri
Publication year - 2021
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.6198
Subject(s) - chemistry , catalysis , melamine , thermogravimetric analysis , palladium , x ray photoelectron spectroscopy , heck reaction , fourier transform infrared spectroscopy , coupling reaction , nuclear chemistry , nanoparticle , magnetic nanoparticles , cyanuric chloride , heterogeneous catalysis , polymer chemistry , inorganic chemistry , chemical engineering , organic chemistry , engineering
A highly efficient and stable heterogeneous catalyst was successfully prepared by anchoring palladium(0) onto melamine‐functionalized Fe 3 O 4 magnetic nanoparticles (MNPs‐Mel‐Pd). With the aid of amine functional groups, melamine was covalently bonded on epoxy functionalized magnetic nanoparticles and then Pd(0) was immobilized on this support with high dispersion. The prepared nanocatalyst exhibits excellent catalytic activity for CC cross coupling (Mizoroki–Heck) of various aryl halides (iodide, bromides, and chrlorides) with olefins under mild reaction condition in relatively short reaction times. The synthesized nanocatalyst was characterized using Fourier transform infrared (FT‐IR) spectroscopy, X‐ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), and X‐ray photoelectron spectroscopy (XPS) techniques. The loading level of Pd in MNPs‐Mel‐Pd catalyst was measured to be 1.26 × 10 −3 mol g −1 by atomic absorption spectroscopy (AAS). In addition, the catalyst can be easily separated and recovered from the reaction mixture by using an external magnet. The heterogeneity of the catalyst was confirmed by the hot filtration test, which was reused for at least six times under the optimized conditions without any significant loss of its activity.