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Two cyclotriveratrylene metal–organic frameworks as effective catalysts for Knoevenagel condensation and CO2 cycloaddition with epoxides

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Abstract

By using a novel imidazole-functional cyclotriveratrylene ligand, two isostructural frameworks, [Cd3(HECTV)(bdc)3]·DMF·6H2O (1) and [Zn3(HECTV)(OH-bdc)3]·3DMF·4H2O (2) (HECTV = 5,6,12,13,19,20-hexaimidazolium-ethoxy-cyclotriveratrylene), were constructed. The two compounds exhibit fascinating 4-fold interpenetration three-dimensional frameworks. There are still large void spaces in the structures despite the interpenetration, which were filled with solvent molecules. Interestingly, 1 demonstrates a single-crystal to single-crystal transformation with the guests changed by a cycloalkane solvent. Strikingly, 1 and 2 feature highly heterogeneous catalytic activities for Knoevenagel condensation and CO2 cycloaddition, respectively. In particular, catalysts 1 and 2 could be reused with good catalytic performance.

Graphical abstract: Two cyclotriveratrylene metal–organic frameworks as effective catalysts for Knoevenagel condensation and CO2 cycloaddition with epoxides

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Publication details

The article was received on 07 Aug 2018, accepted on 16 Oct 2018 and first published on 01 Nov 2018


Article type: Paper
DOI: 10.1039/C8DT03215G
Citation: Dalton Trans., 2018, Advance Article
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    Two cyclotriveratrylene metal–organic frameworks as effective catalysts for Knoevenagel condensation and CO2 cycloaddition with epoxides

    D. Kang, X. Han, X. Ma, Y. Liu and J. Ma, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C8DT03215G

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