A flexible doubly interpenetrated metal–organic framework with gate opening effect for highly selective C2H2/C2H4 separation at room temperature. Issue 17 (12th April 2018)

• Record Type: Journal Article
• Authors: Chen, Di-Ming; Liu, Xiao-Hui; Zhang, Jia-Hui; Liu, Chun-Sen
• Is Part Of: CrystEngComm. Volume 20:Issue 17(2018)
• Page Start: 2341
• Page End: 2345
• Publication Date: 2018-04-12
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c8ce00174j
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : A flexible doubly interpenetrated MOF is realized at room temperature, whose pore spaces could accommodate a significant amount of C2 H2 at room temperature via the gate-opening effect but exclude C2 H4 and C2 H6 outside. Abstract : A flexible metal–organic framework, {[Cu2 (TPPB)2 ](DMF)8 } n (1, H2 TPPB = 4, 4′-((5-(4-(4 H -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 C2 H2 uptake capacity with stepwise and hysteretic sorption behavior, but only limited C2 H4 is absorbed; this enables the discriminatory adsorption of C2 H2 over C2 H4 . The separation potential of this flexible MOF towards C2 H2 /C2 H4 is further established using IAST calculations of mixture adsorption equilibrium.