Evaporation Study of Ionic Liquid with Double-Charged Cationстатья
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Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:The evaporation of dicationic ionic liquid, 1,3-bis(3-methylimidazolium-1-yl)propane bis(trifluoromethanesulfonyl)amide ([C3(MIm)22+][Tf2N−]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 [C3(MIm)22+][Tf2N−]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 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.