The nature of ionic liquids in the gas phase

被引：184
|
作者：
Leal, Joao P.
Esperanca, Jose M. S. S.
Minas da Piedade, Manuel E. [1 ]
Canongia Lopes, Jose N.
Rebelo, Luis P. N.
Seddon, Kenneth R.
机构：
[1] Univ Lisbon, Fac Ciencias, Dept Quim & Bioquim, P-1649016 Lisbon, Portugal
[2] Inst Tecnol & Nucl, Dept Quim, P-2686953 Sacavem, Portugal
[3] UNL, Inst Tecnol Quim & Biol, P-2780901 Oeiras, Portugal
[4] Inst Super Tecn, Ctr Quim Estrutural, P-1049001 Lisbon, Portugal
[5] Queens Univ Belfast, QUILL Ctr, Belfast BT9 5AG, Antrim, North Ireland
来源：
JOURNAL OF PHYSICAL CHEMISTRY A | 2007年 / 111卷 / 28期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1021/jp073006k
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：
Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) experiments showed that when aprotic ionic liquids vaporize under pressure and temperature conditions similar to those of a reduced-pressure distillation, the gas phase is composed of discrete anion-cation pairs. The evolution of the mass spectrometric signals recorded during fractional distillations of binary ionic liquid mixtures allowed us to monitor the changes of the gas-phase composition and the relative volatility of the components. In addition, we have studied a protic ionic liquid, and demonstrated that it exists as separated neutral molecules in the gas phase.
引用
收藏
页码：6176 / 6182
页数：7
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