A field-cycling NMR pulse sequence is described for studying cross-relaxation between unlike nuclear spins in the solid state. The technique has been applied to study proton tunneling in the hydrogen bonds of a carboxylic acid containing 19F and 1H spins. By studying the B-field dependence of the off-diagonal element of the relaxation matrix that characterizes the longitudinal polarizations, an accurate measure of the proton transfer rate is obtained. © 2005 Elsevier Inc. All rights reserved.
CITATION STYLE
Horsewill, A. J., & Wu, W. (2006). Proton tunneling in a hydrogen bond measured by cross-relaxation field-cycling NMR. Journal of Magnetic Resonance, 179(1), 169–172. https://doi.org/10.1016/j.jmr.2005.11.010
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