Vaporisation of a Dicationic Ionic Liquid Revisited

被引：24

作者：

Vitorino, Joana ^{[2
,3
]}

Leal, Joao P. ^{[2
,3
]}

Licence, Peter ^{[4
]}

Lovelock, Kevin R. J. ^{[4
]}

Gooden, Peter N. ^{[4
]}

Minas da Piedade, Manuel E. ^{[2
]}

Shimizu, Karina ^{[1
]}

Rebelo, Luis P. N. ^{[5
]}

Canongia Lopes, Jose N. ^{[1
,5
]}

机构：

[1] IST, Ctr Quim Estrutural, P-1049001 Lisbon, Portugal

[2] FCUL, Dept Quim Bioquim, P-1649016 Lisbon, Portugal

[3] ITN, Unidade Ciencias Quim & Radiofarmaceut, P-2686953 Sacavem, Portugal

[4] Univ Nottingham, Sch Chem, Nottingham NG7 2RD, England

[5] UNL, Inst Tecnol Quim Biol, P-2780901 Oeiras, Portugal

来源：

CHEMPHYSCHEM | 2010年 / 11卷 / 17期

基金：

英国工程与自然科学研究理事会;

关键词：

ionic liquids; ion cyclotron resonance spectrometry; mass spectrometry; molecular dynamics; thermodynamics; GAS-PHASE; VAPOR-PRESSURE; STABILITY;

D O I：

10.1002/cphc.201000723

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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-a-vis their monocationic counterparts.

引用

页码：3673 / 3677

页数：5

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