Water vapour and gas induced phase transformations in an 8-fold interpenetrated diamondoid metal-organic framework.

Autor: Subanbekova A; Department of Chemical Sciences, Bernal Institute, University of Limerick Limerick V94 T9PX Republic of Ireland xtal@ul.ie., Nikolayenko VI; Department of Chemical Sciences, Bernal Institute, University of Limerick Limerick V94 T9PX Republic of Ireland xtal@ul.ie., Bezrukov AA; Department of Chemical Sciences, Bernal Institute, University of Limerick Limerick V94 T9PX Republic of Ireland xtal@ul.ie., Sensharma D; Department of Chemical Sciences, Bernal Institute, University of Limerick Limerick V94 T9PX Republic of Ireland xtal@ul.ie., Kumar N; Department of Chemical Sciences, Bernal Institute, University of Limerick Limerick V94 T9PX Republic of Ireland xtal@ul.ie., O'Hearn DJ; Department of Chemical Sciences, Bernal Institute, University of Limerick Limerick V94 T9PX Republic of Ireland xtal@ul.ie., Bon V; Faculty of Chemistry, Technische Universität Dresden Bergstrasse 66 01062 Dresden Germany., Wang SQ; Department of Chemical Sciences, Bernal Institute, University of Limerick Limerick V94 T9PX Republic of Ireland xtal@ul.ie.; Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (ASTAR) 2 Fusionopolis Way 138634 Singapore., Koupepidou K; Department of Chemical Sciences, Bernal Institute, University of Limerick Limerick V94 T9PX Republic of Ireland xtal@ul.ie., Darwish S; Department of Chemical Sciences, Bernal Institute, University of Limerick Limerick V94 T9PX Republic of Ireland xtal@ul.ie., Kaskel S; Faculty of Chemistry, Technische Universität Dresden Bergstrasse 66 01062 Dresden Germany., Zaworotko MJ; Department of Chemical Sciences, Bernal Institute, University of Limerick Limerick V94 T9PX Republic of Ireland xtal@ul.ie.
Jazyk: angličtina
Zdroj: Journal of materials chemistry. A [J Mater Chem A Mater] 2023 Apr 24; Vol. 11 (17), pp. 9691-9699. Date of Electronic Publication: 2023 Apr 24 (Print Publication: 2023).
DOI: 10.1039/d3ta01574b
Abstrakt: In this work, we report the synthesis, structural characterisation and sorption properties of an 8-fold interpenetrated diamondoid (dia) metal-organic framework (MOF) that is sustained by a new extended linker ligand, [Cd(Imibz) 2 ], X-dia-2-Cd, HImibz or 2 = 4-((4-(1 H -imidazol-1-yl)phenylimino)methyl)benzoic acid. X-dia-2-Cd was found to exhibit reversible single-crystal-to-single-crystal (SC-SC) transformations between four distinct phases: an as-synthesised (from N , N -dimethylformamide) wide-pore phase, X-dia-2-Cd-α; a narrow-pore phase, X-dia-2-Cd-β, formed upon exposure to water; a narrow-pore phase obtained by activation, X-dia-2-Cd-γ; a medium-pore CO 2 -loaded phase X-dia-2-Cd-δ. While the space group remained constant in the four phases, the cell volumes and calculated void space ranged from 4988.7 Å 3 and 47% (X-dia-2-Cd-α), respectively, to 3200.8 Å 3 and 9.1% (X-dia-2-Cd-γ), respectively. X-dia-2-Cd-γ also exhibited a water vapour-induced structural transformation to the water-loaded X-dia-2-Cd-β phase, resulting in an S-shaped sorption isotherm. The inflection point occurred at 18% RH with negligible hysteresis on the desorption profile. Water vapour temperature-humidity swing cycling (60% RH, 300 K to 0% RH, 333 K) indicated hydrolytic stability of X-dia-2-Cd and working capacity was retained after 128 cycles of sorbent regeneration. CO 2 (at 195 K) was also observed to induce a structural transformation in X-dia-2-Cd-γ and in situ PXRD studies at 1 bar of CO 2 , 195 K revealed the formation of X-dia-2-Cd-δ, which exhibited 31% larger unit cell volume than X-dia-2-Cd-γ.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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