Structure–property relationships in ILs: Vaporization enthalpies of pyrrolidinium based ionic liquids
Structure–property relationships in ILs: Vaporization enthalpies of pyrrolidinium based ionic liquids
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DOI：
10.1016/j.molliq.2013.07.018
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发表时间：
2014-04
影响因子：
6
通讯作者：
D. Zaitsau;Andrei V. Yermalayeu;V. N. Emel’yanenko;A. Heintz;S. P. Verevkin;C. Schick;S. Berdzinski;V. Strehmel
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文献类型：
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作者：
D. Zaitsau;Andrei V. Yermalayeu;V. N. Emel’yanenko;A. Heintz;S. P. Verevkin;C. Schick;S. Berdzinski;V. Strehmel
根据石英晶体微天平和热重法的计算结果，对甲基吡咯烷阳离子链长度为奇数的[Cn1Pyrr][NTf2]族化合物的新实验数据进行了验证，将其外推至298℃的参考温度，并推荐了一种基于液体热容的简单方法。结果表明，298K时的汽化热与烷基链长呈线性关系，CH2基团对汽化热的贡献约为4.0kJ·−-1，这在不同的ILS同系物中是普遍存在的。
New experimental data for [Cn1Pyrr][NTf2] family withoddandevenchain length of the methyl-pyrrolidinium cation, based on the concurring results from quartz crystal microbalance and thermogravimetry, have been used for validation of procedures for extrapolation of vaporization enthalpies to the reference temperature 298 K. A simple method based on the liquid heat capacities was recommended. We have shown that vaporization enthalpies at 298 K are linearly dependant on the alkyl chain length with the CH2group contribution to the vaporization enthalpy around 4.0 kJ·mol− 1, which was shown to be common for different ILs homologous series.