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

被引：36

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

页码：241 / 246

页数：6

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