Kolbe F, Krause S, Bon V, Senkoyska I, Kaskel S, Brunner E (2019)
Publication Type: Journal article
Publication year: 2019
Pages Range: 6193-6201
DOI: 10.1021/acs.chemmater.9b02003
Flexible metal-organic frameworks (MOFs) are capable of changing their crystal structure as a function of external stimuli such as pressure, temperature, and type of adsorbed guest species. DUT-49 is the first MOF exhibiting structural transitions accompanied by the counterintuitive phenomenon of negative gas adsorption. Here, we present high-pressure in situ 129Xe NMR spectroscopic studies of a novel isoreticular MOF family based on DUT-49. These porous materials differ only in the length of their organic linkers causing changes in pore size and elasticity. The series encompasses both, purely microporous materials as well as materials with both micropores and small mesopores. The chemical shift of the adsorbed xenon depends on xenon-wall interactions and thus on the pore size of the material. The xenon adsorption behavior of different MOFs can be observed over the whole range of relative pressure. Chemical shift adsorption/desorption isotherms closely resembling the conventional, uptake-measurement-based isotherms were obtained at 237 K where all materials are rigid. The comparable chemical environment of the adsorbed xenon in these isoreticular MOFs allows to establish a correlation between the chemical shift at a relative pressure of p/p
APA:
Kolbe, F., Krause, S., Bon, V., Senkoyska, I., Kaskel, S., & Brunner, E. (2019). High-Pressure in Situ 129Xe NMR Spectroscopy: Insights into Switching Mechanisms of Flexible Metal-Organic Frameworks Isoreticular to DUT-49. Chemistry of Materials, 6193-6201. https://doi.org/10.1021/acs.chemmater.9b02003
MLA:
Kolbe, Felicitas, et al. "High-Pressure in Situ 129Xe NMR Spectroscopy: Insights into Switching Mechanisms of Flexible Metal-Organic Frameworks Isoreticular to DUT-49." Chemistry of Materials (2019): 6193-6201.
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