Solvatomer dynamics of aluminium sulfate in dimethyl sulfoxide/water mixtures

被引：11
|
作者：
Kaatze, U
Telgmann, T
Miecznik, P
机构：
[1] Univ Gottingen, Drittes Phys Inst, D-37073 Gottingen, Germany
[2] Adam Mickiewicz Univ, Inst Acoust, PL-60769 Poznan, Poland
来源：
CHEMICAL PHYSICS LETTERS | 1999年 / 310卷 / 1-2期
关键词：
D O I：
10.1016/S0009-2614(99)00763-0
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The ultrasonic absorption spectra between about 200 kHz and 2 GHz have been measured for 0.1 mol l(-1) solutions of Al-2(SO4)(3) in several mixtures of dimethyl sulfoxide (DMSO) and water at 25 degrees C. A suitable description of the spectra is obtained with a sum of two Debye-type spectral terms and a ten reflecting correlated non-critical fluctuations in ion concentration. The outer-outer-sphere/outer-sphere ion complex equilibrium of the electrolyte seems to be reflected by the low-frequency Debye term, the formation/dissociation of outer-outer-sphere complexes by the concentration fluctuation term. DMSO exchange from solvatomers appears to be the mechanism behind the high-frequency Debye term. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：121 / 129
页数：9
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