Effects of ions in natural water on the 17O NMR chemical shift of water and their relationship to water cluster

The effects of magnetic fields on water molecular hydrogen bonds

“…A lot of studies have been carried out to investigate the dependence of temperature and hydrogen-bonding in water [17,32]. In general hydrogen-bonding gets weaker at increasing the thermal motion of the atoms involved [33].…”

“…For a two-entity model, it implies a hydrogen bond forming and breaking equilibrium [13]. In recent years, the frequently used methods for water molecular structure include Raman scattering, infrared spectrum, X-ray, neutron scattering and NMR [12,[14][15][16][17][18].…”

Comparison of spin–lattice relaxation measurements made in the presence of strong radiation damping

“…Nuclear magnetic resonance (NMR) spectroscopy is widely recognized for its ability to provide chemical information on both molecular structure and dynamics. Through the measurements of both chemical shifts and relaxation time, NMR has been used to investigate the interaction of ions with water [7,8] and the structure of water itself [9]. While 1 H spin-lattice relaxation measurements have been made on water samples to infer that "the rotational motions of water molecules [are] ... slow(ed) down by magnetic treatment" [9], the experimental challenge in making such NMR relaxation measurements on water (with ~110 M concentration of water protons) that arises from radiation damping [10] must be addressed.…”

Research of the Healthy Drinkable Water -- Bama Recreate Water

“…1 Fig. 1 showed, 17 O-NMR peak width at half of tap water became 82.20Hz from 129.60Hz after filtering, and the first three months had a trend of decrease, eventually stabilized around 55Hz, which was close to 65Hz of Bama water , belong to 5~7 small molecules of water clusters [8,9] .…”