Comparison of polarities of room-temperature ionic liquids using FT-IR spectroscopic probes

被引：39

作者：

Tao, GH ^{[1
]}

Zou, M ^{[1
]}

Wang, XH ^{[1
]}

Chen, ZY ^{[1
]}

Evans, DG ^{[1
]}

Kou, Y ^{[1
]}

机构：

[1] Peking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100871, Peoples R China

来源：

AUSTRALIAN JOURNAL OF CHEMISTRY | 2005年 / 58卷 / 05期

关键词：

D O I：

10.1071/CH05025

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The solvent properties, especially the polarity, of room-temperature ionic liquids (RTILs) of the general type [C(n)mim] X, where [C(n)mim] is the 1-CnH2n+ 1-3-methylimidazolium cation and X is [BF4](-), [PF6](-), [NO3](-), [SCN](-), or [NTf2](-) (Tf = CF3SO2), have been investigated using Fourier-transforminfrared ( FTIR) spectroscopy. Comparing the experimental shifts in the nu(C=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.

引用

页码：327 / 331

页数：5

共 45 条

[1] How polar are room-temperature ionic liquids? [J].