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

页码：6176 / 6182

页数：7

共 37 条

[1] Evidence for the clustering of substituted imidazolium salts via hydrogen bonding under the conditions of fast atom bombardment mass spectrometry [J].