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A flexible doubly interpenetrated metal–organic framework with gate opening effect for highly selective C2H2/C2H4 separation at room temperature

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Abstract

A flexible metal–organic framework, {[Cu2(TPPB)2](DMF)8}n (1, H2TPPB = 4,4′-((5-(4-(4H-1,2,4-triazol-4-yl)phenoxy)-1,3-phenylene)bis(oxy))dibenzoic acid, DMF = N,N-dimethylformamide), with a doubly interpenetrated network was solvothermally prepared by employing a flexible bifunctional triazolcarboxylate ligand. This MOF shows a dynamic structure with its network displaying different configurations by accommodating different solvents. More importantly, due to the synergistic effect of its suitable pore size and flexible structural feature, its activated phase demonstrates a significant C2H2 uptake capacity with stepwise and hysteretic sorption behavior, but only limited C2H4 is absorbed; this enables the discriminatory adsorption of C2H2 over C2H4. The separation potential of this flexible MOF towards C2H2/C2H4 is further established using IAST calculations of mixture adsorption equilibrium.

Graphical abstract: A flexible doubly interpenetrated metal–organic framework with gate opening effect for highly selective C2H2/C2H4 separation at room temperature

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Publication details

The article was received on 02 Feb 2018, accepted on 31 Mar 2018 and first published on 02 Apr 2018


Article type: Communication
DOI: 10.1039/C8CE00174J
Citation: CrystEngComm, 2018, Advance Article
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    A flexible doubly interpenetrated metal–organic framework with gate opening effect for highly selective C2H2/C2H4 separation at room temperature

    D. Chen, X. Liu, J. Zhang and C. Liu, CrystEngComm, 2018, Advance Article , DOI: 10.1039/C8CE00174J

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