Transient Oscillations in NMR Cross-Polarization Experiments in Solids

Abstract

Strong transient oscillations have been observed in proton-carbon-13 cross-polarization experiments in a ferrocene single crystal. These oscillations are in contrast with the usually observed exponential behavior of cross polarization. They are manifestations of coherence effects caused by the dipolar coupling of the carbon-13 to the directly bound proton. A simple model is described which explains the observations.