NMR-STUDIES ON REORIENTATIONAL MOTION OF HYDRATED D2O MOLECULES OF HALAIDE IONS (F-, CL-, BR-, AND I-) IN DILUTE AQUEOUS-SOLUTIONS
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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DOI：
10.1246/bcsj.64.1613
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发表时间：
1991-05-01
影响因子：
4
通讯作者：
TANIGUCHI, Y
中科院分区：
文献类型：
--
作者：
SHIMIZU, A;TANIGUCHI, Y
在25℃下，测量了稀卤化钾(KF、KBr、KCl、KI)水溶液中D2O分子的D核和O-17核的自旋晶格驰豫速率。自旋晶格驰豫速率(重取向运动)的B(XBAR)系数与阴离子溶液粘度的B系数之间的一致性略好于阳离子。氯、溴、碘离子组成的D2O分子的水化重定向运动是各向异性的，这种各向异性运动随离子半径增大而增强。另一方面，F-离子的水合D2O分子近似各向同性。
The spin-lattice relaxation rates of the D and O-17 nuclei of D2O molecules have been measured for dilute aqueous solutions of potassium halides (KF, KBr, KCl, KI) in the concentration range below 1.0 mol kg-1 at 25-degrees-C. The agreement between the B(XBAR)' coefficients of the spin-lattice relaxation rate (reorientational motion) and the B-coefficients of the solution viscosity of the anions is somewhat better than that of the cations. The reorientational motion of hydration for D2O molecules of Cl-, Br-, and I- ions was anisotropic; this anisotropic motion is enhanced with increasing ion radius. On the other hand, the hydration D2O molecule of the F- ion was approximately isotropic.