Spectroscopically Probing Microscopic Solvent Properties of Room-Temperature Ionic Liquids with the Addition of Carbon Dioxide

2003 ◽  
Vol 107 (19) ◽  
pp. 3995-4000 ◽  
Author(s):  
Jie Lu ◽  
Charles L. Liotta ◽  
Charles A. Eckert
2011 ◽  
Vol 513 (1-3) ◽  
pp. 53-58 ◽  
Author(s):  
Yoshifumi Kimura ◽  
Akira Kobayashi ◽  
Masashi Demizu ◽  
Masahide Terazima

2005 ◽  
Vol 58 (5) ◽  
pp. 327 ◽  
Author(s):  
Guo-hong Tao ◽  
Ming Zou ◽  
Xiao-hua Wang ◽  
Zhi-yu Chen ◽  
David G. Evans ◽  
...  

The solvent properties, especially the polarity, of room-temperature ionic liquids (RTILs) of the general type [Cnmim]X, where [Cnmim] is the 1-CnH2n+1-3-methylimidazolium cation and X is [BF4]−, [PF6]−, [NO3]−, [SCN]−, or [NTf2]− (Tf = CF3SO2), have been investigated using Fourier-transform infrared (FTIR) spectroscopy. Comparing the experimental shifts in the νC=O stretching frequencies of acetone and N,N-dimethylformamide (DMF) as probe molecules suggests that the polarities of most common RTILs are between that of DMF and methanol. A more sensitive probe, Fe(CO)5, can distinguish small polarity differences between RTILs with similar structures. The effects of varying the structure of RTILs by introducing functional groups and different anions on their polarity are also compared.


2007 ◽  
Vol 19 (25) ◽  
pp. 6187-6194 ◽  
Author(s):  
Sergey M. Borisov ◽  
Magdalena Ch. Waldhier ◽  
Ingo Klimant ◽  
Otto S. Wolfbeis

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