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Rational Construction of a ssa-Type of MOF through Preorganizing the Ligand’s Conformation and Its Exceptional Gas Adsorption Properties

Abstract

Ssa-type MOFs constructed from dicopper paddlewheels and bent diisophthalate exhibit a promising potential for gas adsorption which is benefited from their rich open copper sites and the polyhedron-based cages with suitable sizes. However, rational construction of such type of MOFs is exceedingly challenging because the bent diisophthalate ligands employed are inclined to exhibit various conformations and thus are prone to form MOFs with varied topology. In this work, by preorganizing the ligand’s conformation, we successfully targeted a ssa-type MOF ZJNU-57 from a bent diisophthalate ligand. More significantly, ZJNU-57 exhibits excellent hydrolytic stability and high C2H2 and CO2 uptake capacities as well as impressive C2H2/CH4 and CO2/CH4 adsorption selectivities, indicating its promising potential for C2H2/CH4 and CO2/CH4 separation which are relevant to acetylene production and natural gas purification. This work not only provides a rare water-stable MOF based on Cu2(COO)4 cluster for highly selective adsorption of C2H2 and CO2 from CH4, but also demonstrates that ligand conformation-controlled assembly strategy may be an efficient approach toward the construction of MOF materials with definite topologies for specific applications.

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Publication details

The article was received on 24 Dec 2017, accepted on 10 Jan 2018 and first published on 11 Jan 2018


Article type: Paper
DOI: 10.1039/C7DT04867J
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Rational Construction of a ssa-Type of MOF through Preorganizing the Ligand’s Conformation and Its Exceptional Gas Adsorption Properties

    Y. Wang, M. He, Z. Tian, H. Zhong, L. Zhu, Y. Zhang, X. Zhang, D. Chen and Y. He, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C7DT04867J

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