Conformations of 1-butyl-3-methylimidazolium chloride probed by high pressure Raman spectroscopy

被引：31

作者：

Chang, Hai-Chou ^{[1
]}

Chang, Chao-Yen

Su, Jong-Chang

Chu, Wen-Chi

Jiang, Jyh-Chiang

Lin, Sheng Hsien

机构：

[1] Natl Dong Hwa Univ, Dept Chem, Shoufeng 974, Hualien, Taiwan

[2] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan

[3] Acad Sinica, Inst Atom & Mol Sci, Taipei 106, Taiwan

[4] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

来源：

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES | 2006年 / 7卷 / 10期

关键词：

Raman spectroscopy; high pressure; 1-butyl-3-methylimidazolium chloride;

D O I：

10.3390/i7100417

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The behavior of 1-butyl-3-methylimidazolium chloride has been investigated by Raman spectroscopy as a function of hydrostatic pressure. Under ambient pressure two rotational isomers (GA and AA forms) of the 1-butyl-3-methylimidazolium cation coexist in the ionic liquid state. As the supercooled liquid was compressed from ambient to 0.9 GPa, the contribution of the GA conformer decreases in intensity as the pressure was elevated. A new high pressure phase is formed above the pressure of 1.5 GPa. This new high pressure phase of 1-butyl-3-methylimidazolium chloride arises from perturbed GA conformer, i.e., distorted Crystal 2. Crystal 1 form ( AA form) is known as a thermodynamically stable form under ambient pressure. Nevertheless, crystal 1 form is switched to a metastable state under the condition of high pressure.

引用

页码：417 / 424

页数：8

共 22 条

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