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Issue 83, 2019
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Monitoring fast chemical processes by reaction-interrupted excitation transfer (ExTra) NMR spectroscopy

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Abstract

NMR spectroscopy is generally used to investigate molecules under equilibrium conditions. Despite recent technological and methodogical developments to study on-going reactions, tracing the fate of individual atoms during an irreversible chemical reaction is still a challenging and elaborate task. Reaction-interrupted excitation transfer (ExTra) NMR provides a selective tracking of resonances from atoms, which undergo chemical conversion. We show that reactions triggered either by rapid mixing or by photo-excitation can be conveniently followed at a sub-second time scale using standard NMR equipment. In ExTra NMR we use the selectively inverted magnetization of a selected atom to follow its conversion in the course of a fast chemical reaction. The chemical reaction has to be started within the relaxation period of an initial inverting 180° pulse. The presented protocol provides a generally applicable NMR method for reaction monitoring.

Graphical abstract: Monitoring fast chemical processes by reaction-interrupted excitation transfer (ExTra) NMR spectroscopy

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Publication details

The article was received on 19 Aug 2019, accepted on 26 Sep 2019 and first published on 26 Sep 2019


Article type: Communication
DOI: 10.1039/C9CC06427C
Chem. Commun., 2019,55, 12575-12578
  • Open access: Creative Commons BY license
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    Monitoring fast chemical processes by reaction-interrupted excitation transfer (ExTra) NMR spectroscopy

    G. E. Wagner, S. Tassoti, S. Glanzer, E. Stadler, R. Herges, G. Gescheidt and K. Zangger, Chem. Commun., 2019, 55, 12575
    DOI: 10.1039/C9CC06427C

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