High Field Dynamic Nuclear Polarization with High-Spin Transition Metal Ions
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We report the dynamic nuclear polarization of 1H spins in magic-angle-spinning spectra recorded at 5 T and 84 K via the solid effect using Mn2+ and Gd[superscript 3+] complexes as polarizing agents. We show that the magnitude of the enhancements can be directly related to the effective line width of the central (mS = −1/2 → +1/2) EPR transition. Using a Gd[superscript 3+] complex with a narrow central transition EPR line width of 29 MHz, we observed a maximum enhancement of 13, which is comparable to previous results on the narrow-line-width trityl radical.
Date issued
2011-03Department
Massachusetts Institute of Technology. Department of Chemistry; Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology)Journal
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Citation
Corzilius, Björn et al. “High-Field Dynamic Nuclear Polarization with High-Spin Transition Metal Ions.” Journal of the American Chemical Society 133.15 (2011): 5648–5651.
Version: Author's final manuscript
ISSN
0002-7863
1520-5126