In:
Surface and Interface Analysis, Wiley, Vol. 48, No. 10 ( 2016-10), p. 1066-1071
Abstract:
Supported palladium catalyst (Pd/Fe 3 O 4 @SiO 2 ) was easily prepared by supporting PdCl 2 on silica‐coated magnetic nanoparticles Fe 3 O 4 in ethylene glycol. The as‐prepared sample was characterized by infrared spectroscopy (IR), X‐ray diffraction (XRD) and X‐ray photoelectron spectrometer (XPS). The formation of active specie Pd(0) was confirmed by XRD and XPS, and the Pd loading for the fresh and recovered catalyst was determined by atomic absorption spectroscopy (AAS). Pd/Fe 3 O 4 @SiO 2 was employed for the synthesis of biphenyl derivatives via Suzuki reaction. In terms of the yield of biphenyl, the supported catalyst displayed nearly equal catalytic performance to that of homologous PdCl 2 under microwave irradiation for 30 min but higher than that obtained by traditional heating method for 12 h . The catalytic performance of Pd/Fe 3 O 4 @SiO 2 for Suzuki reactions involving various aryl halides and arylboronic acids were also examined. Impressive yield of biphenyl at 68.2% was obtained even in the presence of unreactive aryl chlorides . Pd/Fe 3 O 4 @SiO 2 was recovered by a permanent magnet and directly reused in the next run, and no obvious deactivation was observed for up to 6 times. Copyright © 2016 John Wiley & Sons, Ltd.
Type of Medium:
Online Resource
ISSN:
0142-2421
,
1096-9918
Language:
English
Publisher:
Wiley
Publication Date:
2016
detail.hit.zdb_id:
2023881-2
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