高等学校化学学报 ›› 2009, Vol. 30 ›› Issue (6): 1210.

• 研究论文 • 上一篇    下一篇

丙氨酸离子液体[C4mim][Ala]的热化学性质

佟静1, 孙迎春2, 房大维1, 杨家振1   

  1. 1. 绿色合成与先进材料制备化学辽宁省高校重点实验室, 辽宁大学化学学院, 沈阳 110036;
    2. 沈阳工业大学石油化工学院, 辽阳111003
  • 收稿日期:2008-08-25 出版日期:2009-06-10 发布日期:2009-06-10
  • 通讯作者: 杨家振, 男, 教授, 博士生导师, 主要从事物理化学研究. E-mail: jzyanglnu@yahoo.com.cn
  • 基金资助:

    国家自然科学基金(批准号: 20773056)和辽宁省教育厅基金(批准号: 20063059, 20063060)资助.

Studies on the Thermo-Chemical Properties of Ionic Liquid Based on Alanine[C4mim][Ala]

TONG Jing1, SUN Ying-Chun2, FANG Da-Wei1, YANG Jia-Zhen1*   

  1. 1. Key Laboratory of Green Synthesis and Preparative Chemistry of Materials, Liaoning University, Shenyang 110036, China;
    2. School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, China
  • Received:2008-08-25 Online:2009-06-10 Published:2009-06-10
  • Contact: YANG Jia-Zhen, E-mail: jzyanglnu@yahoo.com.cn
  • Supported by:

    国家自然科学基金(批准号: 20773056)和辽宁省教育厅基金(批准号: 20063059, 20063060)资助.

摘要:

在298.15 K下利用恒温环境溶解热量计测定了一系列含有已知微量水的1-丁基-3-甲基咪唑丙氨酸盐([C4mim][Ala])离子液体(IL)不同浓度样品的摩尔溶解焓. 借助Debye-Hückel极限项, 用外推法确定了不同含水量的[C4mim][Ala]样品的标准摩尔溶解焓[ΔsHm0(wc)]. 随着样品中水含量的增加, ΔsHm0(wc)的绝对值下降, 将ΔsHm0(wc)对含水量作图得到很好的直线, 其截距ΔsHm0(pure IL)=-60.74 kJ/mol, 可看作是不含水的[C4mim][Ala]标准摩尔溶解焓的估算值. 利用精密氧弹热量计测定了[C4mim][Ala]的燃烧热, 计算得到其标准摩尔生成焓ΔfHm0=(-675±11) kJ/mol.

关键词: 丙氨酸, 离子液体, 溶解焓, 生成焓

Abstract:

The enthalpies of solution of the ionic liquid(IL) based on alanine 1-butyl-3-methylimidazoliam alanine([C4mim][Ala]), with various amount of water, ΔsolHm(wc) was measured over a molality range of about 0.01—0.06 mol/kg by the solution-reaction isoperibol calorimeter at 298.15 K. According to Archer′s method, the standard molar enthalpies of solution of [C4mim][Ala] with a known amounts of water, ΔsolHm0(wc) were obtained. Plotting ΔsolHm0(wc) against water content(w2), was carried out, a good straight line was obtained and the intercept was the standard molar enthalpy of solution of [C4mim][Ala] without water, ΔsHm0(pure IL)=ΔsHm0(pure IL)=-60.74 kJ/mol. Using an oxygen-bomb combustion calorimeter, the molar combustion enthalpy of [C4mim][Ala] was determined at 298.15 K and the standard molar formation enthalpy of [C4mim][Ala], ΔfHm0=(-675±11) kJ/mol, was obtained.

Key words: Alanine, Ionic liquid, Enthalpy of solution, Enthalpy of formation

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