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Open AccessArticle

Multinuclear Magnetic Resonance Study of Sodium Salts in Water Solutions

Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
Magnetochemistry 2019, 5(4), 68; https://doi.org/10.3390/magnetochemistry5040068
Received: 2 November 2019 / Revised: 30 November 2019 / Accepted: 4 December 2019 / Published: 9 December 2019
The small amounts of gaseous 3He dissolved in low concentrated water solutions of NaCl, NaNO3 and NaClO4 were prepared and examined by 3He-, 23Na-, 35Cl- and 15N-NMR spectroscopy. This experimental data, along with new theoretical shielding factors, was used to measure the 23Na nuclear magnetic moment against that of helium-3 μ(23Na) = +2.2174997(111) in nuclear magnetons. The standard relationship between NMR frequencies and nuclear magnetic moments of observed nuclei was used. The nuclear magnetic shielding factors of 23Na cation were verified against that of counter ions present in water solutions. Very good agreement between shielding constants σ(3He), σ(23Na+), σ(35Cl), σ(35ClO4), σ(15NO3) in water at infinite dilution and nuclear magnetic moments was observed for all magnetic nuclei. It can be used as a reference nucleus for calculating a few other magnetic moments of different nuclei by the NMR method. An analysis of new and former μ(23Na) experimental data obtained by the atomic beam magnetic resonance method (ABMR) and other NMR measurements shows good replicability of all specified results. The composition of sodium water complexes was discussed in terms of chemical equilibria and NMR shielding scale. View Full-Text
Keywords: 23Na nuclear magnetic moment; 23Na, 35Cl and 15N nuclear magnetic shielding; NaCl; NaClO4; NaNO3 water solutions; 3He reference nucleus 23Na nuclear magnetic moment; 23Na, 35Cl and 15N nuclear magnetic shielding; NaCl; NaClO4; NaNO3 water solutions; 3He reference nucleus
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Makulski, W. Multinuclear Magnetic Resonance Study of Sodium Salts in Water Solutions. Magnetochemistry 2019, 5, 68.

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