期刊
JOURNAL OF CATALYSIS
卷 268, 期 2, 页码 318-328出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2009.10.001
关键词
Magnetic nanoparticles; Catalysis; Palladium; Heck coupling; Hydrogenation; Kinetics; Catalyst re-use
资金
- EPRSC [EP/C519736/1]
- EPSRC [EP/D064937/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D064937/1] Funding Source: researchfish
A series of novel palladium-based catalysts supported on magnetic nanoparticles with diameters of 7-17 nm have been prepared and evaluated in C-C coupling, hydrogenation and amination reactions. One type of catalyst used palladium complexes containing phosphine and/or acetate ligands for applications in Suzuki and Heck reactions. The second type consisted of Pd(0)-functionalised magnetic cores for use in hydrogenation and C-C coupling. Each type was effective for a range of reactions and was easily recoverable from the reaction mixture due to the superparamagnetic behaviour of the support. Detailed rate studies, found to correspond to pseudo-first-order kinetics, were conducted to assist in determining the mechanism of the reactions and showed that, during Heck reactions, Pd leaching is critically dependent on the presence of the aryl halide. The catalysts were found to retain their activity for several cycles although the rate of reaction was markedly reduced on re-use. Crown Copyright (c) 2009 Published by Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据