Wang Wei, Xiong Xiao-Hong, Zhu Neng-Xiu, Zeng Zheng, Wei Zhang-Wen, Pan Mei, Fenske Dieter, Jiang Ji-Jun, Su Cheng-Yong
MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.
State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, China.
Angew Chem Int Ed Engl. 2022 Jun 27;61(26):e202201766. doi: 10.1002/anie.202201766. Epub 2022 Apr 5.
The design and creation of soft porous crystals combining regularity and flexibility may promote potential applications for gas storage and separation due to their deformable framework's responsiveness to external stimuli. The flexibility of metal-organic frameworks (MOFs) relies on alterable degrees of freedom that are mainly provided by organic linkers or the junctions linking organic and inorganic building units. Herein, we report a new dynamic MOF whose flexibility originates from an unprecedented tailorable Mn O -cluster and shows simultaneous coordination geometry changes and ligand migration that are reversibly driven by guest exchange. This provides an extra degree of freedom to the framework's deformation, resulting in three-dimensional variations in the framework that subtly respond to varied aromatic molecules. The gas adsorption behavior of this flexible MOF was evaluated, and the selective separation of light hydrocarbons and Freon gases is achieved.
设计和创建兼具规则性与灵活性的软质多孔晶体，因其可变形框架对外部刺激的响应性，可能会推动其在气体存储和分离方面的潜在应用。金属有机框架（MOF）的灵活性依赖于可变的自由度，这些自由度主要由有机连接体或连接有机和无机构建单元的节点提供。在此，我们报道了一种新型动态MOF，其灵活性源自前所未有的可定制MnO簇，并展示出同时发生的配位几何结构变化和配体迁移，这些变化由客体交换可逆驱动。这为框架的变形提供了额外的自由度，导致框架发生三维变化，从而对各种芳香族分子产生微妙响应。我们评估了这种柔性MOF 的气体吸附行为，并实现了轻质烃类和氟利昂气体的选择性分离。
