Department of Physical Chemistry, University of Rostock, Dr-Lorenz-Weg. 1, 18059 Rostock, Germany.
Chemphyschem. 2011 Dec 23;12(18):3609-13. doi: 10.1002/cphc.201100618. Epub 2011 Oct 19.
Vaporization enthalpies of a series of ten 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ionic liquids (ILs) [C(n) mim][NTf(2) ] with alkyl chain lengths of n=2, 3, 4, 6, 8, 10, 12, 14, 16, and 18 are determined by using a recently developed quartz crystal microbalance method. Due to the high sensitivity of the microbalance vapor studies can be extended to temperatures 60-100 K lower than those available with other methods. The results reveal a remarkably linear dependence of the vaporization enthalpies on the chain length at the reference temperature of 298 K.
使用最近开发的石英晶体微天平法测定了十一系列 1-烷基-3-甲基咪唑双（三氟甲烷磺酰）亚胺离子液体（ILs）[C(n) mim][NTf(2)]的汽化焓，其中烷基链长 n=2、3、4、6、8、10、12、14、16 和 18。由于微天平蒸气研究的高灵敏度，蒸气研究的温度可以比其他方法低 60-100 K。结果表明，在参考温度 298 K 下，汽化焓与链长呈显著的线性关系。
