Lee Jong-Min, Ruckes Sebastian, Prausnitz John M
Department of Chemical Engineering, University of California, Berkeley, California 94720-1462, USA.
J Phys Chem B. 2008 Feb 7;112(5):1473-6. doi: 10.1021/jp076895k. Epub 2008 Jan 18.
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.
研究了五种最近合成的吡啶鎓离子液体（1-丁基-4-甲基吡啶鎓、1-辛基吡啶鎓、1-辛基-2-甲基吡啶鎓、1-辛基-3-甲基吡啶鎓和1-辛基-4-甲基吡啶鎓，均带有双（三氟甲基磺酰）亚胺阴离子），以确定甲基取代的影响以及阳离子上烷基链长度对极性ET(N)和三个Kamlet-Taft参数的影响：偶极/极化率（π*）、氢键酸度（α）和氢键碱度（β）。实验测量范围为25至65摄氏度。
