物理化学学报 >> 2013, Vol. 29 >> Issue (04): 678-682.doi: 10.3866/PKU.WHXB201301314

热力学,动力学和结构化学 上一篇    下一篇

1-丁基-3-甲基咪唑六氟磷酸盐+水+醇体系的相行为

宁汇, 侯民强, 梅清清, 杨德重, 韩布兴   

  1. 中国科学院化学研究所, 中国科学院胶体界面与化学热力学重点实验室, 北京分子科学国家实验室, 北京 100190
  • 收稿日期:2012-12-11 修回日期:2013-01-28 发布日期:2013-03-25
  • 通讯作者: 韩布兴 E-mail:hanbx@iccas.ac.cn
  • 基金资助:

    国家自然科学基金(20903109, 21073207)资助项目

Phase Behaviors of 1-Butyl-3-methylimidazolium Hexafluorophosphate+Water+Alcohol Systems

NING Hui, HOU Min-Qiang, MEI Qing-Qing, YANG De-Zhong, HAN Bu-Xing   

  1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • Received:2012-12-11 Revised:2013-01-28 Published:2013-03-25
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20903109, 21073207).

摘要:

在298.15 K, 常压下研究了1-丁基-3-甲基咪唑六氟磷酸盐([bmim][PF6])+水+甲醇、[bmim][PF6]+水+乙醇、[bmim][PF6]+水+2-丙醇、[bmim][PF6]+水+1-丙醇三元体系的相行为. 结果表明, 对于含甲醇、乙醇和2-丙醇的体系, 醇在水+醇溶液中摩尔分数分别为0.55-1.00、0.40-0.75 和0.35-0.50 时, 醇的水溶液与[bmim][PF6]可以互溶. 而水+1-丙醇体系没有此类现象. 这说明, 这类三元系的相行为不但取决于醇分子的大小, 而且取决于其结构.

关键词: 离子液体, 水, 醇, 相行为, 共溶剂效应

Abstract:

The phase behaviors of 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim] [PF6]) + water+methanol, [bmim][PF6]+water+ethanol, [bmim][PF6]+water+2-propanol, and [bmim][PF6]+water+1- propanol ternary systems were determined at 298.15 K and ambient pressure. It was demonstrated that when the mole fractions of the alcohols in the water+alcohol solutions were 0.55-1.00, 0.40-0.75, and 0.35-0.50 for methanol, ethanol, and 2-propanol, respectively, the [bmim][PF6] was totally dissolved in the aqueous alcohol solutions due to a strong co-solvent effect. However, water+1-propanol did not exhibit this kind of behavior. Both the size and structure of the alcohols significantly affected the phase behaviors of the ternary systems.

Key words: Ionic liquid, Water, Alcohol, Phase behavior, Co-solvent effect

MSC2000: 

  • O642