室温离子液体[Emim][PF6]和[Bmim][PF6]压致相变的拉曼散射研究

朱祥; 王永强; 王征; 程学瑞; 袁朝圣; 陈镇平; 苏磊

doi:10.11858/gywlxb.2013.02.013

室温离子液体[Emim][PF6]和[Bmim][PF6]压致相变的拉曼散射研究

doi: 10.11858/gywlxb.2013.02.013

郑州轻工业学院高压科学与技术研究中心，河南郑州 450002

详细信息

通讯作者:
苏磊 E-mail:zz_sulei@163.com

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出版历程
- 收稿日期: 2011-10-21
- 修回日期: 2012-03-03
- 发布日期: 2013-04-15

Pressure-Induced Phase Transition of [Emim][PF6] and [Bmim][PF6] Studied by Raman Scattering

The High Pressure Research Center of Science and Technology, Zhengzhou University of Light Industry, Zhengzhou 450002, China

摘要

摘要: 室温条件下，采用拉曼光谱仪和四柱型金刚石压砧（DAC），对两种室温离子液体的压致相变进行了详细的研究。实验表明，对于常压下为固态的1-乙基-3-甲基咪唑六氟磷酸盐（Emim][PF6]，C6H11F6N2P）离子液体，压力增加到约0.86 GPa时，发生固－固相变；对于常压下为液态的1-丁基-3-甲基咪唑六氟磷酸盐（[Bmim][PF6]，C8H15F6N2P）离子液体，压力增加到约0.62 GPa时，发生液－固相变，增加到约1.45 GPa时，发生固－固相变。此外，还对[Bmim][PF6]加压后的卸压过程进行了详细分析，结果表明：离子液体[Bmim][PF6]在0~2 GPa范围内的压致相变是可逆的。
- 室温离子液体 /
- 拉曼光谱 /
- 相变 /
- 高压
Abstract: In-situ pressure-induced phase transition of ionic liquids [Emim][PF6] and [Bmim][PF6] have been studied under high pressure and room temperature by using Raman spectroscopy and high-pressure diamond anvil cell (DAC) apparatus. With the increase of pressure, [Emim][PF6] experiences the solid-solid phase transition at about 0.86 GPa, and [Bmim][PF6] experiences the liquid-solid phase transition at about 0.62 GPa and the solid-solid phase transition at about 1.45 GPa. Furthermore, the decrease of pressure of [Bmim][PF6] has also been discussed in details. Pressure-released Raman spectra shows that the phase transition of [Bmim][PF6] is reversible under pressure up to 2 GPa.
- room temperature ionic liquids /
- Raman spectra /
- phase transition /
- high pressure

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参考文献(34)

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