Solvent polarities and kamlet-taft parameters for ionic liquids containing a pyridinium cation |
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Authors: | Lee Jong-Min Ruckes Sebastian Prausnitz John M |
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Institution: | Department of Chemical Engineering, University of California, Berkeley, California 94720-1462, USA. JMLee@lbl.gov |
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Abstract: | Five recently synthesized pyridinium ionic liquids (1-butyl-4-methylpyridinium, 1-octylpyridinium, 1-octyl-2-methylpyridinium, 1-octyl-3-methylpyridinium, and 1-octyl-4-methylpyridinium, all with anion bis(trifluoromethylsulfonyl)imide], were investigated to establish the influence of substituting a methyl group and the influence of alkyl chain length on the cation on polarity ET(N) and on three Kamlet-Taft parameters: dipolarity/polarizabilty (pi*), hydrogen-bond acidity (alpha), and hydrogen-bond basicity (beta). Experimental measurements cover the range 25 to 65 degrees C. |
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