Combining in Situ Techniques (XRD, IR, and 13C NMR) and Gas Adsorption Measurements Reveals CO2-Induced Structural Transitions and High CO2/CH4Selectivity for a Flexible Metal-Organic Framework JUK-8

Roztocki K, Rauche M, Bon V, Kaskel S, Brunner E, Matoga D (2021)

Publication Type: Journal article

Publication year: 2021

Journal

ACS Applied Materials and Interfaces American Chemical Society

Book Volume: 13

Pages Range: 28503-28513

Journal Issue: 24

DOI: 10.1021/acsami.1c07268

Abstract

Flexible metal-organic frameworks (MOFs) are promising materials in gas-related technologies. Adjusting the material to processes requires understanding of the flexibility mechanism and its influence on the adsorption properties. Herein, we present the mechanistic understanding of CO2-induced pore-opening transitions of the water-stable MOF JUK-8 ([Zn(oba)(pip)]n, oba2- = 4,4′-oxybis(benzenedicarboxylate), pip = 4-pyridyl-functionalized benzene-1,3-dicarbohydrazide) as well as its potential applicability in gas purification. Detailed insights into the global structural transformation and subtle local MOF-adsorbate interactions are obtained by three in situ techniques (XRD, IR, and 13CO2-NMR). These results are further supported by single-crystal X-ray diffraction (SC-XRD) analysis of the solvated and guest-free phases. High selectivity toward carbon dioxide derived from the single-gas adsorption experiments of CO2 (195 and 298 K), Ar (84 K), O2 (90 K), N2 (77 K), and CH4 (298 K) is confirmed by high-pressure coadsorption experiments of the CO2/CH4 (75:25 v/v) mixture at different temperatures (288, 293, and 298 K) and in situ NMR studies of the coadsorption of 13CO2/13CH4 (50:50 v/v; 195 K).

Involved external institutions

Jagiellonian University / Uniwersytet Jagielloński (UJ) PL Poland (PL) Adam Mickiewicz University / Uniwersytet im. Adama Mickiewicza w Poznaniu (UAM) PL Poland (PL) Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Roztocki, K., Rauche, M., Bon, V., Kaskel, S., Brunner, E., & Matoga, D. (2021). Combining in Situ Techniques (XRD, IR, and 13C NMR) and Gas Adsorption Measurements Reveals CO2-Induced Structural Transitions and High CO2/CH4Selectivity for a Flexible Metal-Organic Framework JUK-8. ACS Applied Materials and Interfaces, 13(24), 28503-28513. https://doi.org/10.1021/acsami.1c07268

MLA:

Roztocki, Kornel, et al. "Combining in Situ Techniques (XRD, IR, and 13C NMR) and Gas Adsorption Measurements Reveals CO2-Induced Structural Transitions and High CO2/CH4Selectivity for a Flexible Metal-Organic Framework JUK-8." ACS Applied Materials and Interfaces 13.24 (2021): 28503-28513.

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