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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 15: Poster: New Instruments and Methods

CPP 15.11: Poster

Dienstag, 27. März 2012, 18:15–20:15, Poster A

NMR spectroscopy in pulsed high magnetic fields — Benno Meier^1,2, •Jonas Kohlrautz¹, Jürgen Haase¹, Frederik Wolff-Fabris², Thomas Herrmannsdörfer², and Jochen Wosnitza² — ¹University of Leipzig, Faculty of Physics and Earth Science, Linnéstrasse 5, 04103 Leipzig, Germany — ²Dresden High Magnetic Field Laboratory, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany

We report on the first resolved nuclear magnetic resonance (NMR) measurement of different chemical shifts in pulsed magnetic fields at the Dresden High Magnetic Field Laboratory (Hochfeld-Magnetlabor Dresden). After having minimized the field inhomogeneity across our sample volume down to 35 ppm by reducing the sample dimensions to 0.5 mm in all directions, resolved ¹⁹F spectra of a mixture of hexafluorobenzene and benzotrifluoride were observed, yielding a chemical shift difference of 100 ppm. The scaling of the NMR linewidth with the sample size indicates that the linewidth is determined by spatial variation of the applied field over the sample volume. Thus, it is expected that one can further increase the resolution by reducing the sample dimensions. The spectra are demodulated using our recently demonstrated full understanding of the time dependence of NMR signals in pulsed magnetic fields up to 62 Tesla.