Pulsed Dynamic Nuclear Polarization with Trityl Radicals
Pulsed Dynamic Nuclear Polarization with Trityl Radicals
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2016
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The Journal of Physical Chemistry Letters ; 7 (2016), 1. - pp. 111-116. - eISSN 1948-7185
Abstract
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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MATHIES, Guinevere, Sheetal JAIN, Marcel REESE, Robert G. GRIFFIN, 2016. Pulsed Dynamic Nuclear Polarization with Trityl Radicals. In: The Journal of Physical Chemistry Letters. 7(1), pp. 111-116. eISSN 1948-7185. Available under: doi: 10.1021/acs.jpclett.5b02720BibTex
@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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