• Abstract
• Full-Text PDF [80 KB]

• Article Statistics
• Google Scholar
• Order Reprints

• Cite this article
• Export to BibTeX
• Export to EndNote

• [+] on DOAJ
• Chang, H
• Chang, C
• Su, J
• Chu, W
• Jiang, J
• Lin, S
• [+] on Google Scholar
• Chang, H
• Chang, C
• Su, J
• Chu, W
• Jiang, J
• Lin, S
• [+] on PubMed
• Chang, H
• Chang, C
• Su, J
• Chu, W
• Jiang, J
• Lin, S

•  CiteULike
•  Facebook
•  Mendeley
•  Twitter

This article is

• freely available
• re-usable

Int. J. Mol. Sci. 2006, 7(10), 417-424; doi:10.3390/i7100417

Article

Conformations of 1-Butyl-3-methylimidazolium Chloride Probed by High Pressure Raman Spectroscopy

Hai-Chou Chang ^1,* , Chao-Yen Chang ¹ , Jong-Chang Su ¹ , Wen-Chi Chu ¹ , Jyh-Chiang Jiang ²  and Sheng Hsien Lin ³

¹ Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan ² Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan ³ Institute of Atomic and Molecular Sciences, Academia Sinica, P. O. Box 23-166, Taipei 106, Taiwan ⁴ Department of Chemistry, National Taiwan University, Taipei 106, Taiwan

* Author to whom correspondence should be addressed.

Received: 7 September 2006; in revised form: 29 September 2006 / Accepted: 16 October 2006 / Published: 25 October 2006

(This article belongs to the Special Issue Ionic Liquids)

Download PDF Full-Text [80 KB, uploaded 20 June 2008 16:51 CEST]

Abstract: The behavior of 1-butyl-3-methylimidazolium chloride has been investigated byRaman spectroscopy as a function of hydrostatic pressure. Under ambient pressure tworotational isomers (GA and AA forms) of the 1-butyl-3-methylimidazolium cation coexist inthe 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. Anew high pressure phase is formed above the pressure of 1.5 GPa. This new high pressurephase 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 formunder ambient pressure. Nevertheless, crystal 1 form is switched to a metastable state underthe condition of high pressure.

Keywords: Raman spectroscopy; High pressure; 1-Butyl-3-methylimidazolium chloride.

Article Statistics

Cite This Article