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Facial Preparation of Sulfonic Acid‐Functionalized Magnetite‐Coated Maghemite as a Magnetically Separable Catalyst for Pyrrole Synthesis
Author(s) -
Mahmoudi Hajar,
Jafari Abbas Ali
Publication year - 2013
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201300623
Subject(s) - maghemite , catalysis , materials science , sulfonic acid , chemical engineering , magnetic nanoparticles , magnetite , nanoparticle , magnetic separation , particle size , polypyrrole , nanotechnology , chemistry , organic chemistry , polymer , polymer chemistry , composite material , metallurgy , polymerization , engineering
The synthesis, characterization, and catalytic performance of the new sulfonic acid supported on the magnetic nanoparticles with maghemite coating were reported. The morphology, particle size, structure, magnetic properties, and the formation of nanoparticles with narrow size distribution were investigated. Chemical analysis was performed by using TEM, wide‐angle XRD, FTIR spectroscopy, and X‐ray fluorescence, and magnetic measurements were performed by using vibrating sample magnetometry. The catalyst was found to be active for the synthesis of pyrroles. The nanometer size range of these particles facilitates the catalytic process owing to the increased surface area available for the reaction. The easy separation of the catalyst by an external magnet from liquid‐phase reactions and its usability for at least nine consecutive trials without any decrease in activity are additional advantages.