Correlation of viscosity and conductance with 23Na+ NMR T1 measurements.

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概要

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• The relationship between rotational correlation time and the translational diffusion coefficient (Stokes–Einstein equation) of sodium ions dissolved in a series of water–glycerol solutions was studied. NMR longitudinal relaxation measurements gave an estimate of the rotational correlation time for the hydrated sodium ion. From this, using the Debye and Stokes–Einstein equations the translational diffusion coefficient was calculated. These results were compared with estimates of the sodium ion diffusion coefficient obtained using pulsed field gradient NMR. The simple, chemical system was chosen for this study so that the nature of the sodium relaxation would be unambiguous. Also, conductivity measurements were performed on each solution since the conductivity is intimately related to the rate of ionic diffusion. The results showed that due to the spherical nature of the hydrated sodium ion the Debye and Stokes–Einstein equations are well obeyed allowing translational diffusion coefficients to be calculated from rotational correlation times in good agreement with those measured using pulsed field gradient NMR.

• 公益社団法人 日本化学会の論文

著者

• Price William

  Department of Biochemistry, University of Sydney

• Chapman Bogdan

  Department of Biochemistry, University of Sydney

• Kuchel Philip

  Department of Biochemistry, University of Sydney

関連論文

• Correlation of viscosity and conductance with 23Na+ NMR T1 measurements.

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