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Palladium immobilized on amidoxime‐functionalized magnetic Fe 3 O 4 nanoparticles: a highly stable and efficient magnetically recoverable nanocatalyst for sonogashira coupling reaction
Author(s) -
Veisi Hojat,
Sedrpoushan Alireza,
Maleki Behrooz,
Hekmati Malak,
Heidari Masoud,
Hemmati Saba
Publication year - 2015
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.3390
Subject(s) - sonogashira coupling , chemistry , nanoparticle , catalysis , palladium , hydroxylamine , fourier transform infrared spectroscopy , grafting , transmission electron microscopy , nuclear chemistry , coupling reaction , infrared spectroscopy , heterogeneous catalysis , analytical chemistry (journal) , chemical engineering , nanotechnology , materials science , organic chemistry , polymer , engineering
We describe the synthesis of a novel Fe 3 O 4 /amidoxime (AO)/Pd nanocatalyst by grafting of AO groups on Fe 3 O 4 nanoparticles and subsequent deposition of Pd nanoparticles. Prior to grafting of AO, the 2‐cyanoethyl‐functionalized Fe 3 O 4 nanoparticles prepared through combining 2‐cyanoethyltriethoxysilane and Fe 3 O 4 were treated with hydroxylamine. The AO‐grafted Fe 3 O 4 nanoparticles were then used as a platform for the deposition of Pd nanoparticles. The catalyst was characterized using Fourier transform infrared spectroscopy , X‐ray diffraction, scanning and transmission electron microscopies, vibrating sample magnetometry, wavelength‐ and energy‐dispersive X‐ray spectroscopies and inductively coupled plasma analysis. Fe 3 O 4 /AO/Pd is novel phosphine‐free recyclable heterogeneous catalyst for Sonogashira reactions . Interestingly, the novel catalyst could be recovered in a facile manner from the reaction mixture by applying an external magnet device and recycled seven times without any significant loss in activity. Copyright © 2015 John Wiley & Sons, Ltd.