Magnetic relaxation of quadrupolar nuclei in nonaqueous electrolyte solutions

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Abstract
The NMR relaxation times of the quadrupolar nuclei 7Li, 23Na, 87Rb, and 133Cs in electrolyte solutions in methanol have been measured with pulse and wide‐line techniques. In addition, 87Rb relaxation rates were obtained in solutions of RbF in ethanol, ethylene glycol, and formamide. The data were used to test an electrostatic relaxation theory in the limit of infinite dilution. The theory furnished the relaxation rates of the correct order of magnitude when the suitable model for the state of solvation is applied. With measurements on the concentration dependence of the relaxation rates, the electrostatic theory also allows calculation of the contribution to the relaxation rate due to ion‐ion interaction.