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Synthesis, characterization and application of Fe 3 O 4 @SiO 2 @CPTMO@DEA‐SO 3 H nanoparticles supported on bentonite nanoclay as a magnetic catalyst for the synthesis of 1,4‐dihydropyrano[2,3‐c]pyrazoles
Author(s) -
Eftekhari far Behrouz,
NasrEsfahani Masoud
Publication year - 2020
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.5406
Subject(s) - catalysis , thermogravimetric analysis , chemistry , bentonite , fourier transform infrared spectroscopy , nanoparticle , scanning electron microscope , sulfonic acid , magnetic nanoparticles , nuclear chemistry , yield (engineering) , infrared spectroscopy , spectroscopy , chemical engineering , analytical chemistry (journal) , nanotechnology , materials science , organic chemistry , composite material , physics , quantum mechanics , engineering
Fe 3 O 4 nanoparticles were prepared and decorated on the surface of nanobentonite (NB), and subsequently modified by the organic and inorganic linkers and then sulfonic acid immobilization on the nanoparticles. The NB‐Fe 3 O 4 @SiO 2 @CPTMO@DEA‐SO 3 H catalyst was characterized via Fourier transform‐infrared spectroscopy, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, vibrating‐sample magnetometer, X‐ray diffraction patterns, Brunauer–Emmett–Teller and thermal gravimetric analysis. The new catalyst benefits from a simple preparation method, and environmentally friendly and high magnetic properties of the nanocatalyst, Accordingly, we used it for the synthesis of dihydropyrano[2,3c]pyrazole derivatives in water and ethanol mixture as a green solvent under reflux conditions. Use of mild conditions, easy catalyst separation, cost‐effectiveness, short reaction time, reusability of the catalyst, excellent yield and easy work‐up are the main advantages of the present method.