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- Lei Su
- Southwest Jiaotong University 1 Laboratory of High Pressure Physics, , Chengdu 610031, China
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- Liangbin Li
- University of Science and Technology of China 3 Department of Polymer Science and Engineering and National Synchrotron Radiation Laboratory, , Hefei 230026, China
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- Yun Hu
- Southwest Jiaotong University 1 Laboratory of High Pressure Physics, , Chengdu 610031, China
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- Chaosheng Yuan
- Southwest Jiaotong University 1 Laboratory of High Pressure Physics, , Chengdu 610031, China
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- Chunguang Shao
- Southwest Jiaotong University 1 Laboratory of High Pressure Physics, , Chengdu 610031, China
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- Shiming Hong
- Southwest Jiaotong University 1 Laboratory of High Pressure Physics, , Chengdu 610031, China
書誌事項
- 公開日
- 2009-05-11
- DOI
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- 10.1063/1.3127363
- 公開者
- AIP Publishing
この論文をさがす
説明
<jats:p>Behavior of the phase transition of an ionic liquid, [Cn-mim][PF6], has been investigated under pressures up to 1.0 GPa by using a high-pressure differential thermal analysis (DTA) apparatus. The T versus P phase diagrams of [BMIM][PF6] and [EMIM][PF6] are constructed. The DTA curve of [BMIM][PF6] shows one endothermal valley in heating course at each given pressure, which indicates that a simple phase transition from solid to liquid has taken place under high pressure and that the melting point is an increase function of pressure. However, the DTA curve of [EMIM][PF6] shows two endothermal valleys in the heating course within the tested pressure range, implying that there may exist another phase. After treatment of [EMIM][PF6] at different temperatures under high pressure, the structures of the recovered samples are also investigated by wide-angle x-ray scattering. By considering the results above, it indicates that another crystalline phase exists between the solid and liquid of [EMIM][PF6].</jats:p>
収録刊行物
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- The Journal of Chemical Physics
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The Journal of Chemical Physics 130 (18), 184503-, 2009-05-11
AIP Publishing