Low-temperature cross polarization in view of enhancing dissolution Dynamic Nuclear Polarization in NMR

Dynamic Nuclear Polarization (DNP) induced by saturation of ESR transitions of TEMPO at 1.2 K and 3.35 T is characterized by build-up rates that are typically 5 times faster for protons than for the carboxylic carbon-13 in acetate. We show that cross polarization from protons to carbon-13 allows one to achieve a polarization P(C-13) >20% in less than 10 min, twice as much as has been previously reported, in one-fifth of the time. This should open the way to an unprecedented improvement in the efficiency of dissolution DNP. (C) 2011 Elsevier B.V. All rights reserved.


Published in:
Chemical Physics Letters, 517, 4-6, 234-236
Year:
2011
Publisher:
Elsevier
ISSN:
0009-2614
Keywords:
Laboratories:




 Record created 2011-11-28, last modified 2018-03-17


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