Construction of Stable Helical Metal-Organic Frameworks with a Conformationally Rigid "Concave Ligand".
Construction of Stable Helical Metal-Organic Frameworks with a Conformationally Rigid "Concave Ligand".
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DOI:
10.1002/chem.202101173
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发表时间:
2021-07-26
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A helical-shaped metal-organic framework was prepared using conformationally rigid tetratopic benzoic acid ligand with binding units pointing toward each other (concave ligand). To avoid the obvious intramolecular interactions between binding units, matching spacing groups was applied to introduce atropic repulsion, allowing the formation of extended frameworks for the first time. With this new ligand design, a helical-shaped MOF was successfully prepared with significantly improved air and moisture stability, providing a new strategy for ligand design toward porous material constructions.
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