Monitoring Dynamics, Structure, and Magnetism of Switchable Metal–Organic Frameworks via 1H-Detected MAS NMR

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Jan Blahut - , École normale supérieure de Lyon, Charles University Prague (Author)
  • Arthur L. Lejeune - , École normale supérieure de Lyon, IFP Énergies nouvelles (Author)
  • Sebastian Ehrling - , Chair of Inorganic Chemistry I, 3P INSTRUMENTS GmbH & Co. KG (Author)
  • Irena Senkovska - , Chair of Inorganic Chemistry I (Author)
  • Stefan Kaskel - , Chair of Inorganic Chemistry I (Author)
  • Florian M. Wisser - , Universite Claude Bernard Lyon 1, University of Regensburg (Author)
  • Guido Pintacuda - , École normale supérieure de Lyon (Author)

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 languageEnglish
Pages (from-to)21778-21783
Number of pages6
JournalAngewandte Chemie - International Edition
Volume60
Issue number40
Publication statusPublished - 27 Sept 2021
Peer-reviewedYes

External IDs

PubMed 34273230

Keywords

ASJC Scopus subject areas

Keywords

  • DUT-8(Ni), fast magic-angle spinning, metal–organic framework, paramagnetic NMR, proton detection