VIBRATIONAL STUDIES OF LITHIUM PERCHLORATE IN PROPYLENE CARBONATE SOLUTIONS
VIBRATIONAL STUDIES OF LITHIUM PERCHLORATE IN PROPYLENE CARBONATE SOLUTIONS
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DOI：
10.1021/j100124a007
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发表时间：
1993-06-03
影响因子：
--
通讯作者：
AROCA, R
中科院分区：
文献类型：
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作者：
BATTISTI, D;NAZRI, GA;AROCA, R
本文报道了不同浓度高氯酸锂掺杂的碳酸丙烯酯（PC）的拉曼光谱和红外光谱研究以及电导率和粘度测量。通过AM1法向坐标分析补充了振动模态的分配。在拉曼光谱和红外光谱上，PC和高氯酸盐阴离子的基本振动频率出现了带分裂。在完全对称的高氯酸盐带形状内的光谱曲线拟合显示了自由离子、溶剂共享离子对和接触离子对的贡献。PC环变形带712 cm-1处Li+-PC相互作用较强。通过光谱技术推导出的离子配对为解释电导率和粘度数据提供了理论依据。
Raman and infrared spectroscopic studies and conductivity and viscosity measurements of propylene carbonate (PC) doped with various concentrations of lithium perchlorate are reported. The assignment of the vibrational modes was supplemented by AM1 normal coordinate analysis. Both Raman and infrared spectra showed band splitting in the fundamental vibrational frequencies of PC and perchlorate anion. Spectral curve fitting within the totally symmetric perchlorate band shape showed contributions of free ion, solvent-shared ion pairs, and contact ion pairs. Strong Li+-PC interaction was observed for the PC ring deformation band at 712 cm-1. Ion pairing as deduced by spectroscopic techniques provided a rationale to account for conductivity and viscosity data.