首页> 外文期刊>Zeitschrift fur Naturforschung. A, A journal of physical sciences >~7Li-NMR Studies on Molecular Motion of Hydrated Lithium Ions in Concentrated Aqueous Solutions of LiCl, LiBr, and LiSCN at Low Temperatures
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~7Li-NMR Studies on Molecular Motion of Hydrated Lithium Ions in Concentrated Aqueous Solutions of LiCl, LiBr, and LiSCN at Low Temperatures

机译:低温下LiCl,LiBr和LiSCN浓缩水溶液中水合锂离子分子运动的〜7Li-NMR研究

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摘要

Nuclear spin-lattice relaxation times, T_1, of ~7Li in 13.8mol/kg LiCl-H_2O and 12.3mol/kg LiCl-D_2O solutions have been measured in the temperature range 80K-313K. They showed similar temperature dependences with the same minimum values (27 ±1 ms) which proved that the electric quadrupole interaction is dominant for the relaxation of Li-NMR. The T_1 and T_2 values of ~7Li-NMR in concentrated aqueous solutions of LiCl (8-14mol/kg), LiBr (8-10mol/kg) and LiSCN (8-14mol/kg) at 80 K to 300 K have been studied to obtain information concerning the dynamic properties of Li~+ ions and the effect of anions. Ti at temperatures higher than the glass transition point is governed by a tumbling motion of the hydrated lithium ions.
机译:在80K-313K的温度范围内,测得13.8mol / kg LiCl-H_2O和12.3mol / kg LiCl-D_2O溶液中〜7Li的自旋晶格弛豫时间T_1约为7Li。他们显示出相似的温度依赖性,并且具有相同的最小值(27±1 ms),这证明了电四极相互作用是Li-NMR弛豫的主导。研究了在80 K至300 K的LiCl(8-14mol / kg),LiBr(8-10mol / kg)和LiSCN(8-14mol / kg)的浓水溶液中〜7Li-NMR的T_1和T_2值获得有关Li〜+离子动力学特性和阴离子影响的信息。在高于玻璃化转变温度的温度下,Ti受水合锂离子的翻滚运动支配。

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