NMR Measurements in Solutions of Dialkylimidazolium Haloaluminates
| Autor: | M.L. Saboungi, R.J. Klingler, S. Takahashi, J.W. Rathke, Mo Chen |
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| Rok vydání: | 1992 |
| Předmět: | |
| Zdroj: | ECS Proceedings Volumes. :345-350 |
| ISSN: | 2576-1579 0161-6374 |
| DOI: | 10.1149/199216.0345pv |
| Popis: | {sup 27}Al and {sup 35}Cl NMR spectra of AlCl{sub 3}-1-ethyl-3-methyl imidazolium chloride (EMIC) melts were measured for initial compositions ranging from 50 to 67 mol % AlCl{sub 3} at various temperatures. It was shown by changing the preaquisition delay time (DE value) that the dominant aluminum species are AlCl{sub 4}{sup {minus}} in the melt formed by mixing 50 mol % with EMIC and Al{sub 2}Cl{sub 7}{sup {minus}} in the 67 mol % AlCl{sub 3} melt. In the equimolar mixture, the chemical shift of {sup 27}Al NMR spectrum is 103.28 ppm and the line width is 22.83Hz. In the 67 mol % AlCl{sub 3} mixture, the chemical shift is 103.41 ppm and the line width is 2624Hz. A third species observed at 97 ppm in the {sup 27}Al spectra for the 55 and 60 mol % AlCl{sub 3} mixtures is identified to be a product of the reaction with residual water. The relaxation rates for each species in the melts were determined. |
| Databáze: | OpenAIRE |
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