Research article - Peer-reviewed, 2018
Insights into Functionalization of Metal-Organic Frameworks Using In Situ NMR SpectroscopyYuan, Ning; Church, Tamara L.; Brandt, Erik G.; Hedin, Niklas; Zou, Xiaodong; Bernin, Diana
AbstractPostsynthetic reactions of metal-organic frameworks (MOFs) are versatile tools for producing functional materials, but the methods of evaluating these reactions are cumbersome and destructive. Here we demonstrate and validate the use of in situ NMR spectroscopy of species in the liquid state to examine solvent-assisted ligand exchange (SALE) and postsynthetic modification (PSM) reactions of metal-organic frameworks. This technique allows functionalization to be monitored over time without decomposing the product for analysis, which simplifies reaction screening. In the case of SALE, both the added ligand and the ligand leaving the framework can be observed. We demonstrate this in situ method by examining SALE and PSM reactions of the robust zirconium MOF UiO-67 as well as SALE with the aluminum MOF DUT-5. In situ NMR spectroscopy provided insights into the reactions studied, and we expect that future studies using this method will permit the examination of a variety of MOF-solute reactions.
Keywordsmetal-organic frameworks (MOFs); NMR Spectroscopy; reaction screening; solvent-assisted ligand exchange (SALE); postsynthetic modification (PSM)
Published inScientific Reports
2018, volume: 8, article number: 17530
Swedish University of Agricultural Sciences, Department of Molecular Sciences
Church, Tamara L.
Brandt, Erik G.
Chalmers University of Technology
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