I&EC 36 |
| We have characterized the glassy behavior of some imidazolium based room-temperature ionic liquids (RTILs) and in this context we have been able to understand from a molecular perspective aspects of their solvation dynamics, structural heterogeneity and spectroscopy. Specifically we have addressed whether solvent averaging over local environments occurs on a faster or slower time scale than that of certain photochemical processes. Our results and recent experiments unequivocally prove that some of these solvents have locally heterogeneous environments on a time scale relevant to chemical reactivity. This indicates that we may be facing a new “solvation paradigm” in which the slow dynamics of the solvent and the existence of classes of persistent local environments can be used to induce chemical and photochemical selectivity as has been done in the past with other slow dynamical systems such as in the photo-selective excitation of tryptophan in denatured proteins and cholesterol trapped in membranes.
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Ionic Liquids: Not Just Solvents Anymore OR Ionic Liquids: Parallel Futures (Sponsored by Green Chemistry and Engineering, Separation Science and Technology and Novel Chemistry with Industrial Applications Sub-Divisions)
1:30 PM-5:45 PM, Sunday, 26 March 2006 Georgia World Congress Center -- B314, Oral
Division of Industrial and Engineering Chemistry |