In situ solidification of ionic liquid [EMIM][EtOSO3] from melt under high pressure |
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| Authors: | Haining Li Yunqiang Zhang Xiang Zhu Xuerui Cheng Chunguang Shao Jie Wu |
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| Affiliation: | 1. The High Pressure Research Center of Science and Technology, Zhengzhou University of Light Industry, Zhengzhou 450002, People's Republic of China;2. Department of Engineering Mechanics, Key Laboratory of Advanced Materials Processing &3. Mold of Ministry of Education, Zhengzhou University, Zhengzhou, 450002, People's Republic of China |
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| Abstract: | In situ solidification of 1-ethyl-3-methylimidazolium ethyl sulfate [EMIM][EtOSO3] from melt under high pressure has been investigated by using Raman spectroscopy. The results indicate that [EMIM][EtOSO3] might experience a phase transition at about 2.4 GPa upon compression, which could be identified as solidification to a superpressurized glass by pressure broadening of the sharp ruby R1 fluorescence line. Upon cooling, it solidifies as a glassy state rather than crystallizes at low temperature down to 93 K. These facts are suggestive of a phase transition of liquid to a superpressurized glass induced by compression in [EMIM][EtOSO3], which is similar to the glassy state at low temperature. |
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| Keywords: | ionic liquid Raman spectra phase transition high pressure |
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