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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Evaporation Study of an Ionic Liquid with a Double-Charged Cation
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Evaporation Study of an Ionic Liquid with a Double-Charged Cation

机译：用双电阳离子蒸发离子液体的研究

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摘要

The evaporation of a dicationic ionic liquid, 1,3-bis(3-methylimidazolium-1-yl)propane bis(trifluoromethanesulfonyl)amide ([C_(3)(MIm)_(2)~(2+)][Tf_(2)N~(–)]_(2)), was studied by Knudsen effusion mass spectrometry. Its evaporation is accompanied by a partial thermal decomposition producing monocationic ionic liquids, 1,3-dimethylimidazolium and 1-(2-propenyl)-3-methylimidazolium bis(trifluoromethanesulfonyl)amides, as volatile products. This decomposition does not affect the vaporization characteristics of [C_(3)(MIm)_(2)~(2+)][Tf_(2)N~(–)]_(2), which were established to be as follows. The vaporization enthalpy (550 K) is equal to (155.5 ± 3.2) kJ·mol~(–1); the saturated vapor pressure is described by the equation ln(p /Pa) = ?(18699 ± 381)/(T /K) + (30.21 ± 0.82) in the range of 508–583 K. 1,3-Bis(3-methylimidazolium-1-yl)propane bis(trifluoromethanesulfonyl)amide is the first dicationic ionic liquid, the vaporization characteristics of which were determined with an acceptable accuracy.
机译：蒸发致密层离子液体，1,3-双（3-甲基咪唑鎓-1-基）丙烷双（三氟甲磺酰基）酰胺（[C_（3）（MIM）_（2）〜（2 +）] [TF_（ 2）通过Chaudsen积分质谱研究N〜（ - ）] _（2））。其蒸发伴随着产物分解产生单子系离子液体，1,3-二甲基咪唑鎓和1-（2-丙基）-3-甲基咪唑鎓双（三氟甲磺酰基）酰胺，作为挥发性产品。该分解不会影响[C_（3）（MIM）_（2）〜（2 +）] [TF_（2）n〜（ - ）] _（2）的蒸发特性，这是如下所示。汽化焓（550 k）等于（155.5±3.2）kj·mol〜（-1）;饱和蒸气压由等式Ln（ p / pa）=α（18699±381）/（ t / k）+（30.21±0.82），范围为508-583 K.1 ，3-双（3-甲基咪唑鎓-1-基）丙烷双（三氟甲磺酰基）酰胺是第一致密型离子液体，其蒸发特性以可接受的精度确定。

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