Concentration-Dependent Self-Diffusion of Water in Aqueous Solutions of Lithium Chloride Confined to Porous Glasses

被引：7

作者：

Beckert, S. ^{[1
]}

Gratz, M. ^{[1
]}

Kullmann, J. ^{[2
]}

Enke, D. ^{[2
]}

Stallmach, F. ^{[1
]}

机构：

[1] Univ Leipzig, Fac Phys & Earth Sci, D-04103 Leipzig, Germany

[2] Univ Leipzig, Fac Chem & Mineral, D-04103 Leipzig, Germany

来源：

APPLIED MAGNETIC RESONANCE | 2013年 / 44卷 / 07期

关键词：

FIELD GRADIENT NMR; ELECTROLYTE SOLUTIONS; LI+-ION; RELAXATION; MEDIA; COEFFICIENTS; DYNAMICS; TEMPERATURE; LIQUIDS; SYSTEMS;

D O I：

10.1007/s00723-013-0447-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

H-1 pulsed field gradient nuclear magnetic resonance has been used to study the concentration dependent self-diffusion of water in aqueous solutions of lithium chloride in bulk solutions and in these solutions confined to porous glasses with pore sizes of 6 and 100 nm. For the analysis of the experimental results, an analytical description, which is accounting for the water dynamics around and within the ion's hydration shell, is applied. In the 100 nm pores, the overall water self-diffusion coefficient is reduced by a tortuosity factor and no influence on the dynamics within the hydration shell is detected, while in the 6 nm pores, a significant increase of the mobility of the hydrating water molecules is observed.

引用

页码：827 / 836

页数：10

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