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Updated: Sep 19, 2025
Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
Optimizing Pore Size and Polarity in Halogen-Functionalized Metal-Organic Frameworks for Efficient Xenon/Krypton
Duo Yue1, Rui-Ming Li1, Hui-Ting Zheng1
1GBRCE for Functional Molecular Engineering LIFM, IGCME School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
None:
High-purity xenon (Xe) is crucial in semiconductor manufacturing and medical imaging, but trace krypton (Kr) in Xe poses a significant challenge in separation due to their highly similar properties. Traditional gas separation methods are ineffective for Xe/Kr, necessitating innovative adsorbent materials. This study proposes an effective strategy using halogen-functionalized ligands to adjust the pore size and polarity in metal-organic framework (MOF) materials, achieving efficient Xe/Kr separation. A series of MOFs (LIFM-DMOF-X1, X = F, Cl, Br, I) were designed to simultaneously control pore size and wall polarity. Experimental results show that LIFM-DMOF-Cl1 and LIFM-DMOF-Br1 exhibit excellent adsorption performance and selectivity for Xe/Kr. Theoretical calculations confirm stronger Xe interactions with MOF C-H groups and halogen atoms, validating the structure-property relationship. This approach provides a synergistic strategy for developing particular gas separation materials for Xe/Kr.
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