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Vol. 25 No. 9 (2013): Vol 25 Issue 9

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Study of Preparation and Thermal Stability of Cyano-Functionalized Imidazolium Type Ionic Liquids

https://doi.org/10.14233/ajchem.2013.14098
W.D. Liang
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, P.R. China ; Graduate School of Chinese Academy of Sciences, Beijing, P.R. China ; School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, P.R. China
H.F. Li
School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, P.R. China
G.J. Gou
School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, P.R. China
A.Q. Wang
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, P.R. China

Corresponding Author(s) : W.D. Liang

davidlucas@163.com

Asian Journal of Chemistry, Vol. 25 No. 9 (2013): Vol 25 Issue 9

Abstract

Sixteen imidazolium type cyano-functionalized Brønsted acidic ionic liquids with HSO4– and H2PO4– anion were prepared adopting two-step method and were characterized by FT-IR, 1H and 13C NMR. The onset temperatures of thermal decomposition of the ionic liquids were measured using thermogravimetric analysis. It was found that the decomposition onset temperatures of the as-synthesized ionic liquids were in the range of 200-260 ºC. Additionally, the decomposition temperatures were highly dependent on the nature of the anions. Thermal stability of these cyano-functionalized ionic liquids decreased in the order of HSO4– > H2PO4–.

Keywords

Ionic liquid Cyano-functionalized Thermal stability Brønsted acid Imidazolium
Liang, W., Li, H., Gou, G., & Wang, A. (2013). Study of Preparation and Thermal Stability of Cyano-Functionalized Imidazolium Type Ionic Liquids. Asian Journal of Chemistry, 25(9), 4779–4782. https://doi.org/10.14233/ajchem.2013.14098
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