AN IR STUDY OF THE HYDRATION OF CLO4-, NO3-, I-, BR-, CL-, AND SO42- ANIONS IN AQUEOUS-SOLUTION
AN IR STUDY OF THE HYDRATION OF CLO4-, NO3-, I-, BR-, CL-, AND SO42- ANIONS IN AQUEOUS-SOLUTION
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DOI：
10.1021/j100175a031
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发表时间：
1991-10-31
影响因子：
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通讯作者：
KRISTIANSSON, O
中科院分区：
文献类型：
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作者：
BERGSTROM, PA;LINDGREN, J;KRISTIANSSON, O
研究了ClO_4~-、NO_3~-、I~-、Br~-、Cl~-和SO_4~(2-)阴离子在水溶液中的水化反应。应用双差红外光谱分析方法，在除去H2O和HDO的贡献后，获得了阴离子水合球体中等压分离的HDO分子的OD光谱。每个阴离子都与其邻近的水分子相互作用，从而产生具有特征峰值频率和带宽的OD振动带。结果表明，带宽随能带位置的增加而平稳增加。研究发现，水合水(HDO)分子的外向伸缩强度随着谱带位置的增加而线性减小。通过相关曲线将谱带位置转换为阴离子-水距离。这些数据已经与现有的溶液和固体水合物的X射线和中子衍射数据进行了比较。
The hydration of ClO4-, NO3-, I-, Br-, Cl-, and SO42- anions has been studied in aqueous solution. A double-difference IR spectroscopic method has been applied, whereby OD spectra of isotopically isolated HDO molecules in the hydration spheres of the anions are obtained after the contributions from H2O and HDO in the bulk are removed. Each anion is shown to interact with its neighboring water molecules, which gives rise to OD vibration bands with characteristic peak frequencies and bandwidths. The bandwidth is found to increase smoothly with increasing band position. The OD stretching intensity for hydrating water (HDO) molecules has been found to decrease linearly with band Position. Band positions have been converted to anion-water distances by means of correlation curves. These have been compared to available X-ray and neutron diffraction data on solutions and solid hydrates.