Experimental vibratnional study of imidazolium-based ionic liquids: Raman and infrared spectra of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide and 1-ethyl-3-methylimidazolium ethylsulfate

被引：291
作者：
Kiefer, Johannes [1 ]
Fries, Juergen [2 ]
Leipertz, Alfred [1 ]
机构：
[1] Univ Erlangen Nurnberg, Lehrstuhl Tech Thermodynam, D-91058 Erlangen, Germany
[2] Robert Bosch GmbH, AnP, QMM8, D-91522 Ansbach, Germany
来源：
APPLIED SPECTROSCOPY | 2007年 / 61卷 / 12期
关键词：
Raman spectroscopy; infrared spectroscopy; ionic liquid; imidazolium;
D O I：
10.1366/000370207783292000
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The vibrational structure of two room-temperature ionic liquids with the cation 1-ethyl-3-methylimidazolium [EMIM] and the respective anions bis(trifluoromethylsulfonyl)imide [TFSI] and ethylsulfate [EtOSO3] IS investigated. In particular, attenuated total reflection (ATR) infrared (IR) as well as Raman spectra in the spectral range from 500 to 3500 cm(-1) have been recorded and analyzed. Moreover, the depolarization ratios of the Raman lines are determined. The individual peaks are assigned to the corresponding vibrational modes of the molecules. While the CH stretching region around 3000 cm(-1) is dominating in Raman spectra, it is remarkably weak in IR spectra. Finally, the results for 1-ethyl-3methylimidazolium bis(trifluoromethylsulfonyl)imide are compared to previous studies of single ions available in the literature. This comparison shows good agreement.
引用
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页码：1306 / 1311
页数：6
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