Issue 11, 2024

A synthetic strategy towards single crystals of Zr6 cluster and phosphonate-based metal–organic frameworks

Abstract

Although metal–organic frameworks (MOFs) composed of Zr-based nodes and phosphonate-based linkers show promise in terms of their excellent stability, synthetic strategies to access them are underdeveloped due to the less reversible coordination between Zr-based nodes and phosphonate groups. In this work, we developed a generalizable strategy to access Zr–phosphonate MOFs in two steps via post-synthesis modification which allows for retaining the topology of parent Zr MOFs. Solvent-assisted ligand exchange (SALE) replaces carboxylate linkers with phosphinate linkers, and post-synthetic oxidation affords phosphonate-based linkers. We confirmed the structures through single-crystal X-ray diffraction (SCXRD) studies and fully characterized each MOF through a variety of other techniques. Water and ammonia sorption isotherms reveal that incorporation of phosphonate groups yields a more hydrophilic pore environment with increased Brønsted acidity relative to those of the carboxylate-based analogues. Overall, this strategy provides a new avenue to tune the physical and chemical properties of Zr-MOFs and further enriches the reticular chemistry of this class of materials.

Graphical abstract: A synthetic strategy towards single crystals of Zr6 cluster and phosphonate-based metal–organic frameworks

Supplementary files

Article information

Article type
Paper
Submitted
20 noy 2023
Accepted
30 yan 2024
First published
31 yan 2024
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2024,12, 6399-6404

A synthetic strategy towards single crystals of Zr6 cluster and phosphonate-based metal–organic frameworks

H. Xie, K. O. Kirlikovali, Z. Chen, K. B. Idrees, T. Islamoglu and O. K. Farha, J. Mater. Chem. A, 2024, 12, 6399 DOI: 10.1039/D3TA07163D

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