Comparing the charge distribution along the surface normal in the [C6mim]+ ionic liquid with different anions

被引:10
|
作者
Ridings, Christiaan [1 ]
Lockett, Vera [2 ,3 ]
Andersson, Gunther [1 ]
机构
[1] Flinders Univ S Australia, Flinders Ctr NanoScale Sci & Technol, Adelaide, SA 5001, Australia
[2] Univ S Australia, Ian Wark Res Inst, Mawson Lakes, SA 5095, Australia
[3] Worldwide, NthDegreeTechnol, Tempe, AZ 85284 USA
关键词
Ionic liquid; Surface charge; Depth profile; SUM-FREQUENCY GENERATION; SCATTERING SPECTROSCOPY NICISS; ELECTRICAL DOUBLE-LAYER; 1-BUTYL-3-METHYLIMIDAZOLIUM TETRAFLUOROBORATE; MOLECULAR-DYNAMICS; SALT-SOLUTIONS; CHAIN-LENGTH; TEMPERATURE; INTERFACE; CHEMISTRY;
D O I
10.1016/j.colsurfa.2012.01.033
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
Concentration depth profiles of the elements in [C(6)mim]X (X = [BF4](-) and [Cl](-)) have been determined using neutral impact collision ion scattering spectroscopy in order to investigate how the choice of the anion influences the surface structure of the [C(6)mim](+) ionic liquids. The results show that the more polarisable, fluorinated anion [BF4](-), has a stronger tendency to adsorb to the surface compared to [Cl](-). While the [BF4](-) intermingles with the cation aliphatic chains, the decreased surface propensity of the [Cl](-) allows for the preferential orientation of the cation aliphatic chains pointing towards the vapour phase. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:149 / 153
页数:5
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