Vapourisation of ionic liquids
Vapourisation of ionic liquids
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DOI：
10.1039/b615137j
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发表时间：
2007-01-01
影响因子：
3.3
通讯作者：
Villar-Garcia, Ignacio J.
中科院分区：
文献类型：
--
作者：
Armstrong, James P.;Hurst, Christopher;Villar-Garcia, Ignacio J.
成功地在超高真空中蒸发了8种常见的咪唑基离子液体，用视线质谱仪分析了它们的蒸气，并测定了它们的汽化热(热)。它们被发现以离子对的形式蒸发，汽化热主要取决于液体和气相离子对中的库仑相互作用。提出了一个将蒸发热与离子液体的摩尔体积联系起来的静电模型。
Eight common imidazolium based ionic liquids have been successfully evaporated in ultra- high vacuum, their vapours analysed by line of sight mass spectrometry and their heats (enthalpy) of vapourisation determined. They were found to evaporate as ion pairs, with heats of vapourisation which depend primarily on the coulombic interactions within the liquid phase and the gas phase ion pair. An electrostatic model is presented relating the heats of vapourisation to the molar volumes of the ionic liquids.