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Cu (II)‐β‐cyclodextrin complex stabilized on magnetic nanoparticles: A retrievable hybrid promoter for green synthesis of spiropyrans
Author(s) -
Ahadi Najmieh,
Bodaghifard Mohammad Ali,
Mobinikhaledi Akbar
Publication year - 2019
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.4738
Subject(s) - chemistry , thermogravimetric analysis , catalysis , magnetic nanoparticles , nanoparticle , surface modification , green chemistry , scanning electron microscope , fourier transform infrared spectroscopy , chemical engineering , supramolecular chemistry , leaching (pedology) , cyclodextrin , nuclear chemistry , organic chemistry , molecule , reaction mechanism , materials science , composite material , environmental science , soil science , engineering , soil water
The magnetic core of manganese ferrite (MnFe 2 O 4 ) nanoparticles has a significant stability in comparison with ferrite (Fe 3 O 4 ) nanoparticles. The unique supramolecular properties of β‐cyclodextrin (β‐CD), such as hydrophobic cavity, hydrophilic exterior and ‐OH functional groups, make it a good candidate for functionalization and catalytic application. So, a surface‐modified magnetic solid support with the Cu (II)‐β‐CD complex was prepared. The structure of nanoparticles was characterized by Fourier transform‐infrared spectroscopy, X‐ray powder diffraction, thermogravimetric analysis, vibrating‐sample magnetometry, inductively coupled plasma‐optical emission spectrometry and scanning electron microscope analyses. The catalytic activity of these nanoparticles was investigated in the synthesis of spiropyrans and high yields of desired products obtained under green media. Some advantages of this novel catalyst for this reaction are high yields, short reaction times, green solvent and conditions, easy workup procedure, negligible copper leaching, reusability without a significant diminish in catalytic efficiency, and simple separation of nanocatalyst by using an external magnet alongside the environmental compatibility and sustainability.