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离子液体C3MIBF4和C5MIBF4溶解焓的研究
引用本文:房大维,孙迎春,李吉广,王朕威,杨家振.离子液体C3MIBF4和C5MIBF4溶解焓的研究[J].化学学报,2008,66(4):408-412.
作者姓名:房大维  孙迎春  李吉广  王朕威  杨家振
作者单位:房大维(辽宁大学化学院,稀散元素研究所,沈阳,110036;中国科学院盐湖研究所,西宁,810008);孙迎春(辽宁大学化学院,稀散元素研究所,沈阳,110036);李吉广(辽宁大学化学院,稀散元素研究所,沈阳,110036);王朕威(辽宁大学化学院,稀散元素研究所,沈阳,110036);杨家振(辽宁大学化学院,稀散元素研究所,沈阳,110036)
摘    要:在298.15 K下利用等温环境溶解反应热量计测定了离子液体C3MIBF4(四氟硼酸1-甲基-3-丙基咪唑)和C5MIBF4(四氟硼酸1-甲基-3-戊基咪唑)不同浓度水溶液的摩尔溶解焓(ΔsHm). 借助Pitzer电解质溶液理论, 得到了它们的标准摩尔溶解焓 和Pitzer焓参数: 和 , 并计算了表观相对摩尔焓. 根据Glasser理论计算了离子液体晶格能, 进而估算了离子液体C5MIBF4和C3MIBF4中正离子的水化焓分别为-171 kJ?mol-1 (C5MI)和-207 kJ?mol-1 (C3MI).

关 键 词:离子液体  等温环境溶解反应热量计  溶解焓  Pitzer理论  离子水化焓
收稿时间:2007-06-27
修稿时间:2007-10-16

Study on Solution Enthalpies of Ionic Liquids of C3MIBF4 and C5MIBF4
FANG Da-Wei,SUN Ying-Chun,LI Ji-Guang,WANG Zhen-Wei,YANG Jia-Zhen.Study on Solution Enthalpies of Ionic Liquids of C3MIBF4 and C5MIBF4[J].Acta Chimica Sinica,2008,66(4):408-412.
Authors:FANG Da-Wei  SUN Ying-Chun  LI Ji-Guang  WANG Zhen-Wei  YANG Jia-Zhen
Institution:( College of Chemistry, Institute of Rare and Scattered Elements, Liaoning University, Shenyang 110036)( Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008)
Abstract:The molar enthalpies of dissolution (ΔsHm) of ionic liquids C3MIBF4 (1-methyl-3-propylimida- zolium tetrafluoroborate) and C5MIBF4 (1-methyl-3-pentylimidazolium tetrafluoroborate) in water were determined by a solution-reaction isoperibol calorimeter at 298.15 K. According to Pitzer’s electrolyte solution theory, the standard molar enthalpy values of solutions of C3MIBF4 and C5MIBF4, and Pitzer parameters: and , were obtained, respectively. The hydration enthalpies of cations ΔH in C5MIBF4 and C3MIBF4 estimated from Glasser’s theory of lattice energy were -171 and -207 kJ?mol-1, respectively.
Keywords:ionic liquid  isoperibol calorimeter  solution enthalpy  Pitzer’s theory  hydration enthalpy of cation
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