The Anion Dependence of the Interaction Strength between Ions in Imidazolium-Based Ionic Liquids Probed by Far-Infrared Spectroscopy

详细信息    查看全文

• 作者：Koichi Fumino ; Kai Wittler ; Ralf Ludwig
• 刊名：The Journal of Physical Chemistry B
• 出版年：2012
• 出版时间：August 9, 2012
• 年：2012
• 卷：116
• 期：31
• 页码：9507-9511
• 全文大小：252K
• 年卷期：v.116,no.31(August 9, 2012)
• ISSN：1520-5207

文摘

We have shown that far-infrared (FIR) spectroscopy is a sensitive probe for detecting the anion鈥揷ation interaction strength in imidazolium-based ionic liquids (ILs). Supported by density functional theory (DFT) calculations of frequencies and energies for large IL aggregates, it is observed that frequency shifts stem mainly from varying interaction strength rather than from different reduced masses of the anions. The strongest interaction is observed for the IL containing the acetate anion which is well-known for its effective dissolution power for cellulose.