Pulsed Dynamic Nuclear Polarization with Trityl Radicals

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2016
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Jain, Sheetal
Reese, Marcel
Griffin, Robert G.
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The Journal of Physical Chemistry Letters. 2016, 7(1), pp. 111-116. eISSN 1948-7185. Available under: doi: 10.1021/acs.jpclett.5b02720
Zusammenfassung

Continuous-wave (CW) dynamic nuclear polarization (DNP) is now established as a method of choice to enhance the sensitivity in a variety of NMR experiments. Nevertheless, there remains a need for the development of more efficient methods to transfer polarization from electrons to nuclei. Of particular interest are pulsed DNP methods because they enable a rapid and efficient polarization transfer that, in contrast with CW DNP methods, is not attenuated at high magnetic fields. Here we report nuclear spin orientation via electron spin-locking (NOVEL) experiments using the polarizing agent trityl OX063 in glycerol/water at a temperature of 80 K and a magnetic field of 0.34 T. 1H NMR signal enhancements up to 430 are observed, and the buildup of the local polarization occurs in a few hundred nanoseconds. Thus, NOVEL can efficiently dynamically polarize 1H atoms in a system that is of general interest to the solid-state DNP NMR community. This is a first, important step toward the general application of pulsed DNP at higher fields.

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ISO 690MATHIES, Guinevere, Sheetal JAIN, Marcel REESE, Robert G. GRIFFIN, 2016. Pulsed Dynamic Nuclear Polarization with Trityl Radicals. In: The Journal of Physical Chemistry Letters. 2016, 7(1), pp. 111-116. eISSN 1948-7185. Available under: doi: 10.1021/acs.jpclett.5b02720
BibTex
@article{Mathies2016-01-07Pulse-43420,
  year={2016},
  doi={10.1021/acs.jpclett.5b02720},
  title={Pulsed Dynamic Nuclear Polarization with Trityl Radicals},
  number={1},
  volume={7},
  journal={The Journal of Physical Chemistry Letters},
  pages={111--116},
  author={Mathies, Guinevere and Jain, Sheetal and Reese, Marcel and Griffin, Robert G.}
}
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