| Autor: |
T., Stassin, I., Stassen, J., Marreiros, A.J., Cruz, R., Verbeke, M., Tu, H., Reinsch, M., Dickmann, W., Egger, I.F., Vankelecom, D.E., De Vos |
| Rok vydání: |
2021 |
| DOI: |
10.6084/m9.figshare.14695431 |
| Popis: |
A simple solvent- and catalyst-free method is presented for the synthesis of the large-pore metal−organic framework (MOF) MAF-6 (RHOZn( eIm)2) based on the reaction of ZnO with 2-ethylimidazole vapor at temperatures ≤100 °C. By translating this method to a chemical vapor deposition (CVD) protocol, crystalline films of a large-pore material could be deposited for the first time entirely from the vapor phase. A combination of positron annihilation lifetime spectroscopy (PALS) and Kr physisorption measurements confirmed the porosity of these MOFCVD films and the size of the MAF-6 supercages (diameter ∼2 nm), in close agreement with powder data and calculations. MAF-6 powders and films were further characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), pair distribution function (PDF), and extended X-ray absorption fine structure (EXAFS). The exceptional uptake capacity of MAF-6 in comparison to ZIF-8 is demonstrated by vapor-phase loading of a molecule larger than the ZIF-8 windows. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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