RT Journal Article
T1 A high saturation factor in Overhauser DNP with nitroxide derivatives: the role of 14N nuclear spin relaxation
A1 Enkin, Nikolay
A1 Giménez López, María del Carmen
A1 Porfyrakis, Kyriakos
A1 Tkach, Igor
A1 Bennati, Marina
A1 Enkin, Nikolay
K1 Nitroxide derivatives
K1 Overhauser
K1 Dynamic nuclear polarization
AB Overhauser DNP enhancements of toluene were measured at a magnetic field of 0.35 Tesla in a series of chemically functionalized nitroxide radicals. We observe that the enhancements increase systematically with polarizer size and rotational correlation time. Examination of the saturation factor of 14N nitroxides by pulsed ELDOR spectroscopy led to a quantitative interpretation of the enhancements, for which the saturation factor increases up to almost unity due to enhanced nuclear (14N) relaxation in the nitroxide radical. The observation has a direct impact on the choice of optimum DNP polarizers in liquids.
PB Royal Society of Chemistry
SN 1463-9076
YR 2015
FD 2015-03-30
LK http://hdl.handle.net/10347/32342
UL http://hdl.handle.net/10347/32342
LA eng
NO Enkin, N., Liu, G., Gimenez-Lopez, M.C., Porfyrakis, K., Tkach, I., and Bennati, M. (2015). A high saturation factor in Overhauser DNP with nitroxide derivatives: the role of 14N nuclear spin relaxation. Physical Chemistry Chemical Physics, 17, 11144-11149
NO Financial support from: the Max Planck Society and the COST Action TD1103 (European Network on Hyperpolarization), NE acknowledges the Graduate School for Neurosciences, Biophysics and Molecular Biosciences in Göttingen.
DS Minerva
RD 22 abr 2026