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Assembly of Dicobalt and Cobalt-Aluminum Oxide Clusters on Metal-Organic Framework and Nanocast Silica Supports

Abstract

NU-1000, a mesoporous metal-organic framework (MOF) featuring hexazirconium oxides nodes and 3-nm wide channels, was infiltrated with a reactive dicobalt complex to install dicobalt active sites onto the MOF nodes. The anchoring of the dicobalt complex onto NU-1000 occurred with a nearly ideal stoichiometry of one bimetallic complex per node and with the cobalt evenly distributed throughout the MOF particle. To access thermally robust multimetallic sites on an all-inorganic support, the modified NU-1000 materials containing either the dicobalt complex, or an analogous cobalt-aluminum species, were nanocast with silica. The resulting materials feature Co2 or Co-Al bimetallated hexazirconium oxide clusters within a silica matrix. The cobalt-containing materials are competent catalysts for the selective oxidation of benzyl alcohol to benzaldehyde. Catalytic activity depends on the number of cobalt ions per node, but does not vary significantly between the NU-1000 and silica supports. Hence, the multimetallic oxide clusters remain site-isolated and substrate-accessible in the nanocast materials.

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Publication details

The article was received on 04 Feb 2017, accepted on 16 Mar 2017, published on 16 Mar 2017 and first published online on 16 Mar 2017


Article type: Paper
DOI: 10.1039/C7FD00055C
Citation: Faraday Discuss., 2017, Accepted Manuscript
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    Assembly of Dicobalt and Cobalt-Aluminum Oxide Clusters on Metal-Organic Framework and Nanocast Silica Supports

    S. P. Desai, C. Malonzo, T. Webber, J. Duan, A. B. Thompson, S. J. Tereniak, M. R. DeStefano, C. T. Buru, Z. Li, R. L. Penn, O. Farha, J. T. Hupp, A. Stein and C. Lu, Faraday Discuss., 2017, Accepted Manuscript , DOI: 10.1039/C7FD00055C

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