Conformational preferences of two imidazolium-based ionic liquids at high pressures

被引：35
|
作者：
Takekiyo, Takahiro [1 ]
Imai, Yusuke [2 ]
Hatano, Naohiro [1 ]
Abe, Hiroshi [2 ]
Yoshimura, Yukihiro [1 ]
机构：
[1] Natl Def Acad, Dept Appl Chem, Kanagawa 2398686, Japan
[2] Natl Def Acad, Dept Mat Sci & Engn, Kanagawa 2398686, Japan
来源：
CHEMICAL PHYSICS LETTERS | 2011年 / 511卷 / 4-6期
关键词：
X-RAY-SCATTERING; RAMAN-SPECTROSCOPY; ROOM-TEMPERATURE; VOLUME CHANGES; MOLECULAR-CONFORMATIONS; ROTATIONAL-ISOMERISM; PHASE-TRANSITIONS; N-PENTANE; 1,2-DICHLOROETHANE; TETRAFLUOROBORATE;
D O I：
10.1016/j.cplett.2011.06.022
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：
Conformational stabilities of 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim][BF(4)]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF(4)]) at high pressures have been investigated by Raman spectroscopy. The trans (planar) conformer for the CNCC angle of the [emim](+) is predominant at high pressures, but the conformational change of the CNCC angle of the [bmim](+) is independent of pressure. The gauche-trans conformer for the butyl cation of the [bmim](+) is predominant at high pressures. Thus, the difference in the alkyl chain length between the cations causes the respective conformational preferences of the two imidazolium-based ionic liquids at high pressures. (C) 2011 Elsevier B. V. All rights reserved.
引用
收藏
页码：241 / 246
页数：6
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