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Creation of Exclusive Artificial Cluster Defects by Selective Metal Removal in the (Zn, Zr) Mixed-metal UiO-66

MPG-Autoren
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Rüscher,  Martina
Interface Science, Fritz Haber Institute, Max Planck Society;

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Timoshenko,  Janis
Interface Science, Fritz Haber Institute, Max Planck Society;

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Roldan Cuenya,  Beatriz
Interface Science, Fritz Haber Institute, Max Planck Society;

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Zitation

Feng, X., Jena, H., Krishnaraj, C., Arenas-Esteban, D., Leus, K., Wang, G., et al. (2021). Creation of Exclusive Artificial Cluster Defects by Selective Metal Removal in the (Zn, Zr) Mixed-metal UiO-66. Journal of the American Chemical Society, 143(51), 21511-21518. doi:10.1021/jacs.1c05357.


Zitierlink: https://hdl.handle.net/21.11116/0000-0009-75DC-C
Zusammenfassung
The differentiation between missing linker defects and missing cluster defects in MOFs is difficult, thereby limiting the ability to correlate materials properties to a specific type of defects.
Herein, we present a novel and easy synthesis strategy for the creation of solely “missing cluster defects”by preparing mixed-metal (Zn, Zr)-UiO-66 followed by a gentle acid wash to remove the Zn nodes. The resulting material has the reo UiO-66 structure, typical for well-defined missing cluster defects. The missing clusters are
thoroughly characterized, including low-pressure Ar-sorption, iDPC-STEM at a low dose (1.5 pA), and XANES/EXAFS analysis. We show that the missing cluster UiO-66 has a negligible number of missing linkers. We show the performance of the missing cluster
UiO-66 in CO2 sorption and heterogeneous catalysis.