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Pulsed Dynamic Nuclear Polarization with Trityl Radicals.
- Source :
-
The journal of physical chemistry letters [J Phys Chem Lett] 2016 Jan 07; Vol. 7 (1), pp. 111-6. Date of Electronic Publication: 2015 Dec 21. - Publication Year :
- 2016
-
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. (1)H 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 (1)H 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.
Details
- Language :
- English
- ISSN :
- 1948-7185
- Volume :
- 7
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- The journal of physical chemistry letters
- Publication Type :
- Academic Journal
- Accession number :
- 26651876
- Full Text :
- https://doi.org/10.1021/acs.jpclett.5b02720