期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 19, 期 1, 页码 288-293出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201201978
关键词
acceptor number; donor number; ionic liquids; solvatochromism
资金
- Fond zur Forderung der Wissenschaftlichen Forschung in Osterreich (FWF) [19335-N17]
- Deutsche Forschungsgemeinschaft (DFG) [SPP 1191, DFG SP392/23]
Solute properties are known to be strongly influenced by solvent molecules due to solvation. This is due to mutual interaction as both the properties of the solute and of the solvent strongly depend on each other. The present paper is based on the idea that ionic liquids are cations solvated by anions and anions solvated by cations. To show this (in this system strongly pronounced) interaction the long time established donor-acceptor concept for solvents and ions in solution by Viktor Gutmann is extended to ionic liquids. A number of solvent parameters, such as the Kamlet-Abboud-Taft and the Dimroth-Reichardt ET scale for ionic liquids neglect this mutual influence, which, however, seems to be in fact necessary to get a proper description of ionic liquid properties. It is shown how strong such parameters vary when the influence of the counter ion is taken into account. Furthermore, acceptor and donor numbers for ionic liquids are presented.
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