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Title: Hybrid Pd/Fe{sub 3}O{sub 4} nanowires: Fabrication, characterization, optical properties and application as magnetically reusable catalyst for the synthesis of N-monosubstituted ureas under ligand-free conditions

Highlights: • Preparation of Pd/Fe{sub 3}O{sub 4} nanowires as magnetically reusable catalysts. • The optical properties of the catalyst were studied using Gans theory. • N-arylation of benzylurea and in situ hydrogenolysis of 1-benzyl-3-arylureas. - Abstract: This paper reports the synthesis and use of Pd/Fe{sub 3}O{sub 4} nanowires, as magnetically separable catalysts for ligand-free amidation coupling reactions of aryl halides with benzylurea under microwave irradiation. Then, the in situ hydrogenolysis of the products was performed to afford the N-monosubstituted ureas from good to excellent yields. This method has the advantages of high yields, simple methodology and easy work up. The catalyst can be recovered by using a magnet and reused several times without significant loss of its catalytic activity. The catalyst was characterized using the powder XRD, SEM, EDS and UV–vis spectroscopy. Experimental absorbance spectra was compared with results from the Gans theory.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [2]
  1. Department of Chemistry, Faculty of Science, University of Qom, Qom 37185-359 (Iran, Islamic Republic of)
  2. Department of Physics, University of Qom, Qom (Iran, Islamic Republic of)
  3. Department of Petroleum Geoscience, Faculty of Science, Soran University, PO Box 624, Soran, Kurdistan Regional Government (Iraq)
Publication Date:
OSTI Identifier:
22348682
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 55; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ARYLATION; CATALYSTS; DISPERSIONS; FERRITES; FOURIER TRANSFORM SPECTROMETERS; FOURIER TRANSFORMATION; GALLIUM NITRIDES; HYBRIDIZATION; INFRARED SPECTRA; IRON OXIDES; IRRADIATION; LIGANDS; NANOWIRES; NUCLEAR MAGNETIC RESONANCE; OPTICAL PROPERTIES; SCANNING ELECTRON MICROSCOPY; SYNTHESIS; UREA; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY