NMR Studies on Reorientational Motion of Hydrated D2O Molecules of Halaide Ions (F-, Cl-, Br-, and I-) in Dilute Aqueous solutions.
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概要
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The spin–lattice relaxation rates of the D and <SUP>17</SUP>O nuclei of D<SUB>2</SUB>O molecules have been measured for dilute aqueous solutions of potassium halides (KF, KBr, KCl, KI) in the concentration range below 1.0 mol kg<SUP>−1</SUP> at 25°C. The agreement between the <I>B</I><SUB>\barx</SUB>′ coefficients of the spin–lattice relaxation rate (reorientational motion) and the B<SUP>−</SUP> coefficients of the solution viscosity of the anions is somewhat better than that of the cations. The reorientational motion of hydration for D<SUB>2</SUB>O molecules of Cl<SUP>−</SUP>, Br<SUP>−</SUP>, and I<SUP>−</SUP> ions was anisotropic; this anisotropic motion is enhanced with increasing ion radius. On the other hand, the hydration D<SUB>2</SUB>O molecule of the F<SUP>−</SUP> ion was approximately isotropic.
- 公益社団法人 日本化学会の論文
著者
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Taniguchi Yoshihiro
Department Of Applied Chemistry Faculty Of Science And Engineering Ritsumeikan University
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Shimizu Akio
Department of Bioengincering Facutly of Engineering,Soka University
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