Determination of tensorial orientation of chemical shift anisotropy interaction by relaxation studies of 2IzSz spin order in solution

Abstract

The observation of selective conversion of Zeeman order into a two-spin order, e.g., 2I{sub z}S{sub z}, of the C-H moiety is made with a coherence transfer technique for measuring the cross correlation of chemical shift anisotropy and dipole-dipole interactions. The temperature-dependent relaxation profiles of the two-spin order are investigated to examine the effect of spin-rotation interaction, which was neglected in a previous study, and subsequently to determine the tensorial orientation of chemical shift anisotropy interaction. Results show excellent agreement with the study from two-dimensional NMR powder spectra.