Effects of ions on chemical shift of 17O-NMR(δ(H2 17O)) and water structure

In the concentration of 0 similar to 1 mol . L-1, the chemical shift of O-17-NMR (delta((H2O)-O-17))in aqueous solutions of alkali chloride, alkaline earth chloride, sodium halide or some common oxysalt were measured. It is found that delta((H2O)-O-17) depends on ion radius, ion charge, outside electron structure of ion and structure of ion. As the other parameters of ions keep unchanged, the larger the ion radius, the more the molar delta((H2O)-O-17) of the ion is. With the same outer electron structure of ion, the more the ion charge, the more the molar delta((H2O)-O-17) of the ion is. The molar delta((H2O)-O-17) of multiple atom ion correlate with the structure of ion much more. It is deduced that the molar delta((H2O)-O-17) of ion correlate with the effect of ion on water structure. The more the molar delta((H2O)-O-17) of the ion, the intenser the effect of the ion on promoting water structure.