Interaction induced magnetic relaxation of quadrupolar ionic nuclei in electrolyte solutions

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Abstract
The electrostatic theory of magnetic relaxation of quadrupolar nuclei in electrolyte solutions is reinvestigated. Contrary to previous treatments purely microscopic expressions for the field gradient correlation function are derived. The influence of solvent dipoles and quadrupoles as well as the influence of other ions in the solution are considered. Due to the collective character of the correlation functions static and dynamic cancellation of two-particle by three-particle contributions is expected. In all cases the resulting correlation functions closely resemble those of interaction-induced spectra. Some general properties of these interaction-induced field gradient correlation functions are discussed, which differ considerably from those of previous investigations.