Yue Duo, Li Rui-Ming, Zheng Hui-Ting, Yan Le, Song Liang, Langer Robert, Barboiu Mihail, Wei Zhang-Wen, Jiang Ji-Jun, Su Cheng-Yong
GBRCE for Functional Molecular Engineering LIFM, IGCME School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
Faculty of Natural Sciences II, Institute of Chemistry Inorganic Chemistry, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Straße 2, Halle D-06120, Germany.
ACS Appl Mater Interfaces. 2025 Jun 18;17(24):36252-36259. doi: 10.1021/acsami.5c08672. Epub 2025 Jun 6.
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-X, X = F, Cl, Br, I) were designed to simultaneously control pore size and wall polarity. Experimental results show that LIFM-DMOF-Cl and LIFM-DMOF-Br 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.
高纯度氙（Xe）在半导体制造和医学成像中至关重要，但氙中的痕量氪（Kr）因其性质极为相似，给分离带来了重大挑战。传统的气体分离方法对Xe/Kr无效，因此需要创新的吸附材料。本研究提出了一种利用卤素功能化配体来调节金属有机框架（MOF）材料孔径和极性的有效策略，以实现高效的Xe/Kr分离。设计了一系列MOF（LIFM-DMOF-X，X = F、Cl、Br、I）来同时控制孔径和孔壁极性。实验结果表明，LIFM-DMOF-Cl和LIFM-DMOF-Br对Xe/Kr表现出优异的吸附性能和选择性。理论计算证实Xe与MOF的C-H基团和卤素原子之间的相互作用更强，验证了结构-性能关系。该方法为开发用于Xe/Kr的特定气体分离材料提供了一种协同策略。
