Spin-spin relaxation of aqueous clusters of Na+ and K+ as studied by O-17 NMR spectroscopy

The relaxation characteristics of the O-17 nucleus in aqueous clusters of Na+ and K+ were studied by nuclear magnetic resonance (NMR) spectroscopy. The influence of the viscosity p and pH value of the solution on the spin-spin relaxation of O-17 nucleus was investigated. In the presence of either electrolyte at concentrations from 10(5) to 4 mol/l, the spin-spin relaxation time is longer than for doubly distilled water. This suggests that the water network experiences rearrangement under the action of these cations.