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Synthesis of the cross-linked humic acid supporting palladium catalyst and its catalytic properties for Heck reaction

introduction to spectroscopy[M]. Edition 1, Higher Education Press, Beijing, 2001. Hardy, J. J.E, Hubert, S. & Macquarrie, D., et al. (2004). Chitosan based heterogeneous catalysts for Suzuki and Heck reactions. Green Chem. 2004, 6(1): 53-56. DOI: 10.1039/B312145N. Cui, Y. C. & Zhang, L. (2005). Polyvinyl chloride-polyethylene-polyamine supported palladium complexes as high efficient and recyclable catalysts for Heck reaction. J. Mol. Catal. A: Chem , 237(1-2): 120-125. DOI: 10.1016/j.molcata.2005

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Catalytic performances of cross-linking humic acids supported Pd/Ni bimetallic catalyst for heck reaction

References Biffis, A., Zecca, M. & Basato, M. (2001). Palladium metal catalysts in Heck C-C coupling reactions. J mol Catal A Chem , 173(1-2): 249-274.DOI:10.1016/S1381-1169(01)00153-4. Deiters, A. & Stephen, F. M. (2004). Synthesis of Oxygen- and Nitrogen-Containing Heterocycles by Ring-Closing Metathesis. Chem. Rev. , 104 (5):2199-2238.10.1021/cr0200872. Irina, P. & Andrei, V. (2000). The Heck Reaction as a Sharpening Stone of Palladium Catalysis. Chem Rev , 100(8): 3009

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Magnetic recykling of complex catalysts immobilized on thiol-functionalized polymer supports

Abstract

In this work, the application of the thiol-functionalized epoxy resin encapsulated on magnetic core as supports for palladium catalysts is reported. The study focuses on obtaining of heterogeneous catalysts which can be separated by magnetic field. Palladium complex catalyst [PdCl2(PhCN)2] has been heterogenized by anchoring to these supports via ligand exchange reaction. The characterization of polymeric supports and heterogenized palladium catalysts has involved research methods like time-of-flight secondary ion mass spectrometry (TOF-SIMS), scanning electron microscopy (SEM) and nitrogen BET surface area measurements. The activity and stability during long-term use of the investigated catalytic systems were tested in a Heck and hydrogenation reaction. The influence of the type of thiols used as epoxy hardeners and the morphology of the supports on the catalytic properties of epoxy-supported palladium catalysts was discussed.

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