Purification of imidazolium ionic liquids for spectroscopic applications

被引：235

作者：

Nockemann, P ^{[1
]}

Binnemans, K ^{[1
]}

Driesen, K ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Chem, B-3001 Heverlee, Belgium

来源：

CHEMICAL PHYSICS LETTERS | 2005年 / 415卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2005.08.128

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ionic liquids are often contaminated by colored impurities. These impurities can be problematic for spectroscopic studies or for monitoring organic reactions by UV/Vis spectroscopy. The effect of different purification methods on the optical quality of colored ionic liquids was studied and compared. Yellowish ionic liquids can partially be decolorized by treatment with active charcoal or by recrystallization. Our experiments show column liquid chromatography is not always a good technique to prepare spectrograde imidazolium halide ionic liquids. Colorless and UV-transparent ionic liquids were synthesized by a method that can exclude the need for further purification steps. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：131 / 136

页数：6

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