FT-Raman spectroscopic evidences for the preferential solvation of sodium tetrafluorobrate in acetonitrile-based mixed solvents

被引：7

作者：

Xuan, XP ^{[1
]}

Wang, JJ ^{[1
]}

Zhao, Y ^{[1
]}

Zhang, HC ^{[1
]}

机构：

[1] Henan Normal Univ, Dept Chem, Xinxiang 453002, Henan, Peoples R China

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2005年 / 62卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

sodium tetrafluorobrate; dimethylformamide; acetonitrile; dimethylsulfoxide; Raman spectrum; preferential solvation;

D O I：

10.1016/j.saa.2005.02.003

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Solutions of sodium tetrafluorobrate in acetonitrile-dimethylformamide, and acetonitrile-dimethylsulfoxide mixtures have been studied by FT-Raman spectroscopy for three solvent compositions, respectively. New bands due to solvent molecules in the first solvation shell of Na+ were detected in the region of the O=C-N deformation and CH3 rocking mode for amide and of the S=O and C-S stretching modes for sulfoxide. The individual solvation numbers of sodium cation in different environment were deduced. In all the cases, it is found that the sodium ion was preferentially solvated by DMF or DMSO in respective binary solvents. This result was further supported by ab initio calculations. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：500 / 505

页数：6

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