Interchanged Hysteresis for Carbon Dioxide and Water Vapor Sorption in a Pair of Water-Stable, Breathing, Isoreticular, 2-Periodic, Zn(II)-Based Mixed-Ligand Metal-Organic Frameworks
| Autor: | Nolwazi Gcwensa, Nabanita Chatterjee, Clive L. Oliver |
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| Rok vydání: | 2019 |
| Předmět: |
010405 organic chemistry
Chemistry Bilayer Sorption 010402 general chemistry 01 natural sciences 0104 chemical sciences Inorganic Chemistry Crystallinity Crystallography Hysteresis chemistry.chemical_compound Desorption Carbon dioxide Metal-organic framework Physical and Theoretical Chemistry Water vapor |
| Zdroj: | Inorganic chemistry. 58(3) |
| ISSN: | 1520-510X |
| Popis: | We report the synthesis of two isoreticular mixed-ligand metal–organic frameworks (MOFs), namely, [Zn(μ2-ia)(μ2-bpe)]n·nDMF (1) and [Zn(μ2-mia)(μ2-bpe)]n·nDMF (2), where ia = isophthalate, mia = 5-methoxyisophthalate, bpe = 1,2-bis(4-pyridyl)ethane, and DMF = N,N′-dimethylformamide. Single-crystal X-ray diffraction studies revealed that the structures of 1 and 2 consist of a 2-periodic, layer sql motif. Structures exhibit entanglement through interpenetration of neighboring frameworks to form a two-dimensional bilayer. Variable-temperature powder X-ray diffraction studies confirmed both structures retain crystallinity upon desolvation up to ∼500 K. Although structurally similar, activated samples of 1 and 2 showed differing gas and vapor sorption capabilities. Despite activated 2 having the higher actual void space, activated 1 showed significantly higher sorption for carbon dioxide at 195 K, as well as significant hysteresis upon desorption. Empirical evidence points toward weaker bilayer···bilayer inter... |
| Databáze: | OpenAIRE |
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