| Vibrational Spectroscopic Study on Ion Solvation and Association of Lithium Perchlorate in 4-Methoxymethyl-ethylene Carbonate |
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| 作者姓名： | 乔宏伟 栾和林 周智明 姚文 |
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| 作者单位： | [1]School of Chemical Engineering and the Environment, Beijing Institute of Technology, Beijing 100081, China [2]Beijing General Research Institute of Mining and Metallurgy, Beijing 100044, China |
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| 基金项目： | Project supported by the National Basic Research 973 Program of China （No. 2002CB211800）. |
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| 摘 要： | Solvation interaction and ion association in solutions of lithium perchlorate/4-methoxymethyl-ethylene carbonate （MEC） have been studied by using Infrared and Raman spectra as a function of concentration of lithium perchlorate. The splitting of ring deformation band and ring ether asymmetric stretching band, and the change of carbonyl stretching band suggest that there should be a strong interaction between Li^＋ and the solvent molecules, and the site of solvation should be the oxygen atom of carbonyl group. The apparent solvation number of Li^＋ was calculated by using band fitting technique. The solvation number was decreased from 3.3 to 1.1 with increasing the concentration of LiClO4/MEC solutions. On the other hand, the band fitting for the ClO4^- band revealed the presence of contact ion pair, and free ClO4^- anion in the concentrated solutions.
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| 关 键 词： | 高氯酸锂 4-甲氧甲基-碳酸乙烯酯溶剂 离子溶剂化 离子缔合 振动光谱研究 |
| 修稿时间： | 2006-06-222006-12-25 |
Vibrational Spectroscopic Study on Ion Solvation and Association of Lithium Perchlorate in 4-Methoxymethyl-ethylene Carbonate |
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| QIAO Hong-Wei, LUAN He-Lin, ZHOU Zhi-Ming, YAO Wen.Vibrational Spectroscopic Study on Ion Solvation and Association of Lithium Perchlorate in 4-Methoxymethyl-ethylene Carbonate[J].Chinese Journal of Chemistry,2007,25(4):461-464. |
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| Authors: | QIAO Hong-Wei LUAN He-Lin ZHOU Zhi-Ming YAO Wen |
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| Institution: | 1. School of Chemical Engineering and the Environment, Beijing Institute of Technology, Beijing 100081, China; 2. Beijing General Research Institute of Mining and Metallurgy, Beijing 100044, China |
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| Abstract: | Solvation interaction and ion association in solutions of lithium perchlorate/4‐methoxymethyl‐ethylene carbonate (MEC) have been studied by using Infrared and Raman spectra as a function of concentration of lithium perchlorate. The splitting of ring deformation band and ring ether asymmetric stretching band, and the change of carbonyl stretching band suggest that there should be a strong interaction between Li+ and the solvent molecules, and the site of solvation should be the oxygen atom of carbonyl group. The apparent solvation number of Li+ was calculated by using band fitting technique. The solvation number was decreased from 3.3 to 1.1 with increasing the concentration of LiClO4/MEC solutions. On the other hand, the band fitting for the ClO?4 band revealed the presence of contact ion pair, and free ClO?4 anion in the concentrated solutions. |
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| Keywords: | vibrational spectroscopy ion solvation and association lithium perchlorate solvation number |
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