Monitoring Dynamics, Structure, and Magnetism of Switchable Metal–Organic Frameworks via 1H-Detected MAS NMR
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
We present a toolbox for the rapid characterisation of powdered samples of paramagnetic metal–organic frameworks at natural abundance by 1H-detected solid-state NMR. Very fast MAS rates at room and cryogenic temperatures and a set of tailored radiofrequency irradiation schemes help overcome the sensitivity and resolution limits often associated with the characterisation of MOF materials. We demonstrate the approach on DUT-8(Ni), a framework containing Ni2+ paddle-wheel units which can exist in two markedly different architectures. Resolved 1H and 13C resonances of organic linkers are detected and assigned in few hours with only 1–2 mg of sample at natural isotopic abundance, and used to rapidly extract information on structure and local internal dynamics of the assemblies, as well as to elucidate the metal electronic properties over an extended temperature range. The experiments disclose new possibilities for describing local and global structural changes and correlating them to electronic and magnetic properties of the assemblies.
Details
Original language | English |
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Pages (from-to) | 21778-21783 |
Number of pages | 6 |
Journal | Angewandte Chemie - International Edition |
Volume | 60 |
Issue number | 40 |
Publication status | Published - 27 Sept 2021 |
Peer-reviewed | Yes |
External IDs
PubMed | 34273230 |
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Keywords
ASJC Scopus subject areas
Keywords
- DUT-8(Ni), fast magic-angle spinning, metal–organic framework, paramagnetic NMR, proton detection