Physicochemical characterization of paramagnetic ionic liquids 1‐vinyl‐3‐alkylimidazolium tetrahalogenidoferrate(III) [VRIM][FeClmBr4 − m] |
| |
Authors: | Yimei Tang Xiaoling Hu Ping Guan Xiangping Lin Xiaoqian Li |
| |
Affiliation: | School of Natural and Applied Science, Northwestern Polytechnical University, The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education, , Xi'an, 710072 China |
| |
Abstract: | Using microwave‐assisted synthesis method, a series of paramagnetic ionic liquids comprising 1‐vinyl‐3‐alkylimidazolium VRIM+ cation and tetrahalogenidoferrate (III) FeClmBr4 ? m? anion were designed and synthesized. The structure was analyzed using 1H NMR and Raman spectroscopy. Ultraviolet–visible absorption spectra, thermal stability, magnetic susceptibility, viscosity, ionic conductivity, and solubility were characterized. Results show that elongation of the alkyl chain leads to replacement of bromides with a small amount of chlorides in the anion, shifting of UV maximum absorption peaks to shorter wavelengths, reduction of ionic conductivity, and solubility in polar solvents, as well as increase in fluidity, magnetic susceptibility, and solubility in nonpolar solvents. Copyright © 2014 John Wiley & Sons, Ltd. |
| |
Keywords: | 1‐vinyl‐3‐alkylimidazolium magnetic ionic liquids physicochemical properties tetrahalogenidoferrate |
|
|