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Issue 15, 2012
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A facile route for preparing a mesoporous palladium coordination polymer as a recyclable heterogeneous catalyst

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Abstract

To overcome the separation difficulty of the palladium-based homogeneous catalyst, the palladium complex can be anchored on various supports such as silica, polymers and nanoparticles. For the same purpose, we describe a general and facile method to immobilize palladium bis(phosphine) complexes on the basis of the technique widely used for metal–organic framework (MOF) synthesis, yielding a mesoporous coordination polymer palladium-CP1. Although palladium complexes are generally not stable enough to allow further manipulation, we succeeded in preparation of a palladium coordination polymer without by-product Pd clusters or nanoparticles. The fresh palladium-CP1 catalyst exhibits a yield close to 55% for tolane at room temperature and 24 h in Sonogashira coupling of iodobenzene and phenylacetylene, as compared with a yield of 89% for its homogeneous counterpart [Pd(PPh3)2Cl2]. Furthermore, this catalyst is stable enough to be reused more than four times with no Pd and Zn leaching. Therefore this new immobilization method offers great promise for the produce of recyclable palladium heterogeneous catalysts with higher activity and higher thermal and chemical stability in the future.

Graphical abstract: A facile route for preparing a mesoporous palladium coordination polymer as a recyclable heterogeneous catalyst

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Publication details

The article was received on 16 Nov 2011, accepted on 25 Jan 2012 and first published on 01 Mar 2012


Article type: Paper
DOI: 10.1039/C2DT12192A
Citation: Dalton Trans., 2012,41, 4692-4698
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    A facile route for preparing a mesoporous palladium coordination polymer as a recyclable heterogeneous catalyst

    S. Zhang, Q. Liu, M. Shen, B. Hu, Q. Chen, H. Li and J. Amoureux, Dalton Trans., 2012, 41, 4692
    DOI: 10.1039/C2DT12192A

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