Hybrid Pd/Fe3O4 nanowires: Fabrication, characterization, optical properties and application as magnetically reusable catalyst for the synthesis of N-monosubstituted ureas under ligand-free conditions
| Autor: | A. Azarian, Ferydon Babaei, Ali Ehsani, S. Mohammad Sajadi, Mahmoud Nasrollahzadeh |
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| Rok vydání: | 2014 |
| Předmět: |
Gans theory
Materials science Mechanical Engineering Aryl Inorganic chemistry Nanowire Halide Condensed Matter Physics Coupling reaction Catalysis chemistry.chemical_compound chemistry Mechanics of Materials Hydrogenolysis Organic chemistry General Materials Science Fourier transform infrared spectroscopy |
| Zdroj: | Materials Research Bulletin. 55:168-175 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/j.materresbull.2014.03.038 |
| Popis: | This paper reports the synthesis and use of Pd/Fe 3 O 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. |
| Databáze: | OpenAIRE |
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