AI Article Synopsis
- Al-based building units for MOFs lack structural diversity compared to Al-oxo molecular cluster chemistry, posing synthesis challenges due to weak coordination.
- A new strategy uses strong Al-carboxylate and weak Cu-pyrazol N linkages to create a unique MOF named FDM-91 with large Al-based units.
- Post-synthetic modifications of FDM-91 result in two stable MOFs with excellent water harvesting capacities and demonstrate a method for selectively dissociating linkages, advancing the synthesis of both complex and discrete structures.
Article Abstract
In contrast to the vast Al-oxo molecular cluster chemistry, Al-based building units for metal-organic framework (MOF) construction are limited in structural diversity and complexity. Synthesis of single crystalline MOFs based on this "hard" metal is further complicated by the poor reversibility of the Al-organic coordination linkages. Here, a strategy to employ two kinds of linkages with distinct strength-strong Al-carboxylate linkage and weak Cu-pyrazol N linkage-gives FDM-91 (FDM=Fudan Materials) with gigantic Al -based units. After replacing the weak moieties with organic linkers post-synthetically, two new stable MOFs with exceptional water harvesting capacity (up to 0.53 g g ) and outstanding cycling performance are developed. Linkage-selective dissociation of FDM-91 further leads to the isolation of the Al molecular clusters. The versatile chemistry performed here to reinforce or deconstruct MOFs provides a new way to make important extended and discrete structures.
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| http://dx.doi.org/10.1002/anie.202217864 | DOI Listing |
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