Surface Tensions of Bis(trifluoromethylsulfonyl)imide Anion-Based Ionic Liquids
Surface Tensions of Bis(trifluoromethylsulfonyl)imide Anion-Based Ionic Liquids
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DOI：
10.1021/je100253m
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发表时间：
2010-09-01
期刊：
影响因子：
--
通讯作者：
Coutinho, Joao A. P.
中科院分区：
文献类型：
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作者：
Carvalho, Pedro J.;Neves, Catarina M. S. S.;Coutinho, Joao A. P.
在常压下，测量了以NTf 2为阴离子的咪唑、吡啶、吡咯烷和磷等6种离子液体的表面张力及其与温度（293 ~ 353）K的关系.选择一组选定的离子液体，以研究阳离子烷基链的长度和位置以及阳离子家族对基于NTf 2阴离子的离子液体的表面张力的影响。由表面张力的温度依赖性导出了表面熵和表面焓等表面热力学函数，其值表明了离子液体表面有序化的重要性。使用古根海姆和Eotvos的相关性的估计的临界温度的离子液体进行了讨论，和定量结构-性质关系（QSPR）的相关性，以前扩展的离子液体，在这里扩展的研究阳离子。
Experimental measurements of the surface tension of six imidazolium-, pyridinium-, pyrrolidinium-, and phosphonium-based ionic liquids (ILs) with NTf2 as the common anion and their dependence with the temperatures of (293 to 353) K at atmospheric pressure are presented. The set of selected ILs was chosen to investigate the influence of the length and position of the cation alkyl chain and the cation family on the surface tension of the ILs based on the NTf2 anion. The surface thermodynamic functions such as surface entropy and enthalpy were derived from the temperature dependence of the surface tension, and their values indicate the importance of the surface ordering in ILs. The use of the Guggenheim and Eotvos correlations for the estimation of the critical temperatures of ILs is discussed, and a quantitative structure-property relationship (QSPR) correlation, previously extended for ILs, is here extended for the studied cations.