Departamento de Química e Bioquímica/FCUL, 1649-016 Lisboa, Portugal.
Chemphyschem. 2010 Dec 3;11(17):3673-7. doi: 10.1002/cphc.201000723.
The vaporization of a dicationic ionic liquid at moderate temperatures and under reduced pressures--recently studied by line-of-sight mass spectrometry--was further analyzed using an ion-cyclotron resonance mass spectroscopy technique that allows the monitoring of the different species present in the gas phase through the implementation of controlled ion-molecule reactions. The results support the view that the vapour phase of an aprotic dicationic ionic liquid is composed of neutral ion triplets (one dication attached to two anions). Molecular dynamics simulations were also performed in order to explain the magnitude of the vaporization enthalpies of dicationic ionic liquids vis-à-vis their monocationic counterparts.
在中等温度和减压条件下，二价离子液体的蒸发——最近通过视线质谱法进行了研究——进一步使用离子回旋共振质谱技术进行了分析，该技术通过实施受控的离子-分子反应，可以监测气相中存在的不同物种。研究结果支持了这样一种观点，即非质子化二价离子液体的气相由中性离子三聚体（一个二价阳离子与两个阴离子结合）组成。还进行了分子动力学模拟，以解释二价离子液体的蒸发热与它们的单阳离子对应物相比的大小。
