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

Gabriel E. Wagner, Sebastian Tassoti, Simon Glanzer, Eduard Stadler, Rainer Herges, Georg Gescheidt, Klaus Zangger*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)12575-12578
Number of pages4
JournalChemical Communications
Issue number83
Publication statusPublished - 1 Jan 2019

ASJC Scopus subject areas

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry


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