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Two unique copper cluster-based metal–organic frameworks with high performance for CO2 adsorption and separation

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Abstract

Two novel porous MOFs, [Cu2Cl(TZI)(H2O)3]·4DMA (compound 1) and [Cu2(TZI)(OH)(DMF)]·DMF·H2O (compound 2) (H3TZI = 5-(tetrazol-5-yl)isophthalic acid, DMA = N,N-dimethylacetamide, and DMF = N,N-dimethylformamide), have been successfully synthesized using the same ligand consisting of isophthalate and tetrazolate groups and CuCl2·2H2O through the secondary building unit (SBU) strategy. Both compounds are constructed from copper cluster-based SBUs. Compound 1 is made up of two different cages based on a Cu paddlewheel and rare-reported double-crown like hexanuclear Cu cluster. In this SBU, the Cu atom adopts a five-coordination in a trigonal bipyramidal configuration, which is very rare in reported MOFs. Moreover, compound 1 with dual functionalities of open metal sites (OMSs) and N-rich Lewis basic sites (LBSs) exhibits good CO2 adsorption (92 cm3 g−1 at 273 K) and high-effect separation ability (9.6 for CO2/CH4 = 0.5/0.5 under 1 bar at 298 K).

Graphical abstract: Two unique copper cluster-based metal–organic frameworks with high performance for CO2 adsorption and separation

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Publication details

The article was received on 07 Dec 2018, accepted on 03 Jan 2019 and first published on 04 Jan 2019


Article type: Research Article
DOI: 10.1039/C8QI01315B
Citation: Inorg. Chem. Front., 2019, Advance Article
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    Two unique copper cluster-based metal–organic frameworks with high performance for CO2 adsorption and separation

    J. Yuan, J. Li, S. Che, G. Li, X. Liu, X. Sun, L. Zou, L. Zhang and Y. Liu, Inorg. Chem. Front., 2019, Advance Article , DOI: 10.1039/C8QI01315B

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