TEMPERATURE EFFECTS ON THE ROTATIONAL MOTION OF THE COORDINATED D_2O MOLECULES IN CsBr AQUEOUS SOLUTION STUDIED BY NMR SPECTROSCOPY

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概要

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• The spin-lattice relaxation times(T_1) of ^2D and ^17O nuclei of coordinated heavy water (D_2O) molecules for Cs^+ in cesium bromide dilute aqueous solutions were measured in the range of 5-50^0C by means of NMR.The spin-lattice relaxation rates (R_1=1/T_1) varied linearly with the concentration up to 1 mol/kg at a given temperature.The parallel(^2D) and the perpendicular (^<17>O) rotational correlation times of coordinated D_2O molecules for Cs^+ were determined.The ratio τ(^2D)/τ(^<17>O) of the rotational correlation times of coordinated D_2O molecules for Cs^+ was smaller than unity and was practically independent of temperature, which indicated that the rotational anisotropies of coordinated D_2O molecules for Cs^+ was almost temperature independent.The activation energy of rotation of coordinated D_2O molecules for Cs^+ was smaller than that of D_2O molecules in pure liquid.It is related to the orientation of the D_2O molecule in the (first) hydration shell of Cs^+.

• 社団法人日本材料学会の論文
• 1996-03-15

著者

• Shimizu A

  Department Of Bioengineering Faculty Of Engineering Soka University

• Shimizu Akio

  Department Of Bioengineering Faculty Of Engineering Soka University

• Taniguchi Yoshihiro

  Department Of Chemistry Faculty Of Science And Engineering Ritsumeikan University

• FUMINO Koichi

  Department of Chemistry, Faculty of Sciience and Engineering, Ritsumeikan University

• Fumino Koichi

  Department Of Chemistry Faculty Of Sciience And Engineering Ritsumeikan University

• Taniguchi Yoshihiro

  Department Of Applied Chemistry Faculty Of Science And Engineering Ritsumeikan University

• Shimizu Akio

  Department of Bioengincering Facutly of Engineering,Soka University

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