A Rare Flexible Metal–Organic Framework Based on a Tailorable Mn8‐Cluster Showing Smart Responsiveness to Aromatic Guests and Capacity for Gas Separation

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 d...

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Published inAngewandte Chemie International Edition Vol. 61; no. 26; pp. e202201766 - n/a
Main Authors Wang, Wei, Xiong, Xiao‐Hong, Zhu, Neng‐Xiu, Zeng, Zheng, Wei, Zhang‐Wen, Pan, Mei, Fenske, Dieter, Jiang, Ji‐Jun, Su, Cheng‐Yong
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 27.06.2022
EditionInternational ed. in English
Subjects
Clusters
Crystals
Deformation
Degrees of freedom
Dynamic MOFs
External stimuli
Flexibility
Flexible MOFs
Formability
Gas Adsorption
Gas separation
Metal-organic frameworks
Mn8O38-Cluster
Stimuli-Responsiveness
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Summary: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 Mn8O38‐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. An extra degree of freedom to framework flexibility contributed by size‐ and shape‐tailorable metal clusters is established, leading to three‐dimensional variations of the framework that are smartly responsive to varied aromatic molecules.
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ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.202201766