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Journal Article

High DNP efficiency of TEMPONE radicals in liquid toluene at low concentrations.

MPS-Authors
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Enkin,  N.
Research Group of Electron Paramagnetic Resonance, MPI for biophysical chemistry, Max Planck Society;

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Liu,  G.
Research Group of Electron Paramagnetic Resonance, MPI for biophysical chemistry, Max Planck Society;

/persons/resource/persons15928

Tkach,  I.
Research Group of Electron Paramagnetic Resonance, MPI for biophysical chemistry, Max Planck Society;

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Bennati,  M.
Research Group of Electron Paramagnetic Resonance, MPI for biophysical chemistry, Max Planck Society;

External Resource
Fulltext (public)

2023945.pdf
(Publisher version), 2MB

Supplementary Material (public)

2023945_Suppl.pdf
(Supplementary material), 948KB

Citation

Enkin, N., Liu, G., Tkach, I., & Bennati, M. (2014). High DNP efficiency of TEMPONE radicals in liquid toluene at low concentrations. Physical Chemistry Chemical Physics, 16(9), 8795-8800. doi:10.1039/C4CP00854E.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-1A22-5
Abstract
We show that at low concentrations (≤5 mM) TEMPONE radicals in liquid toluene exhibit higher DNP efficiency than in water. In spite of reduced coupling factors, the improved DNP performance in toluene results from favourable saturation and leakage factors, as determined by pulse electron–electron double resonance (ELDOR) and NMR relaxation, respectively. The extracted coupling factors at 0.35 Tesla support theoretical predictions of the Overhauser mechanism.