By Joan F. Brennecke, Robin D. Rogers, and Kenneth R. Seddon (Eds.)
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Additional info for Ionic Liquids IV. Not Just Solvents Anymore
E. Heimer , and J. S. S. Air Force Academy, C O 80840-6230 2 A new method of obtaining molecular reorientational dynamics from C spin-lattice relaxation data of aromatic carbons in viscous solutions is applied to the cation and anion of the ionic liquid, 1-ethyl-3-methyl-imidazolium butane -sulfonate ([EMIM]BSO ). Rotational correlation times are compared with viscosity data and indicate several [ E M I M ] B S 0 phase changes over the temperature range from 278 to 328 K. Chemical shift anisotropy values are obtained for the ring and immediately adjacent methylene and methyl carbons in the imidazolium cation and for the three carbon atoms nearest to the sulfonate group in the anion.
A: Chemistry 2004, 165, 229-240. D. , Seddon, K . R . Eds. A C S Symposium Series 902, American Chemical Society 2005, pp 182-198. Gathergood, N . ; Garcia, M . ; Scammells, P J . Green Chem. 2004, 6, 166175. Garcia, M . J. Green Chem. 2005, 7, 9-14. ; Storoniak, P. Environ. Sci. Poll. Res. 2005, 12, 199-204. ; ACS Symposium Series; American Chemical Society: Washington, DC, 2007. 20 19. Kroon, M . -J. Green Chem. 2006, 8, 241-245. 20. ; Bottin-Weber, U . ; Schaefer, M . ; Welz-Biermann, U . ; Thöming, J.
Several investigations in this area have recently been conducted by Prof. Scammells' group, which has investigated the baseline biodegradability of ionic liquids, as well as the influence of structural modifications to the alkyl chain and the influence of the type of anion on biodégradation (16, 17). According to recent reports, alkylimidazolium entities are characterized by poor to negligible biodegradability. Incorporating an ester in the side chain, however, significantly enhanced biodégradation.
Ionic Liquids IV. Not Just Solvents Anymore by Joan F. Brennecke, Robin D. Rogers, and Kenneth R. Seddon (Eds.)