Vibrational study of the contact ion pair formation in the NaClO3-DMF system

被引：7

作者：

Alves, WA ^{[1
]}

Faria, RB ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Quim, Dept Quim Inorgan, BR-21945970 Rio De Janeiro, Brazil

来源：

VIBRATIONAL SPECTROSCOPY | 2003年 / 31卷 / 01期

关键词：

IR spectra; Raman spectra; chlorate; ion pair;

D O I：

10.1016/S0924-2031(02)00048-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Infrared and Raman studies of sodium chlorate in N,N-dimethylformamide (DMF) at different concentrations allowed to observe changes that are interpreted in terms of the contact ion pair formation. As the DMF is an ionising solvent it was possible to observe the equilibrium between associated and non-associated chlorate. In addition, depolarisation measurements were used to distinguish between the asymmetric and symmetric band representations in almost all regions of this anion. The vibrational assignment is entirely satisfactory indicating that in the Na+ClO3- contact ion pair the local symmetry around ClO3- changes from C-3v to C-S. In addition, our results do not show any evidence for the formation of solvent separated ion pairs and aggregates in this system. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：25 / 29

页数：5

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