1-乙基-3-甲基咪唑丙氨酸离子液体热力学性质的研究

引用本文: 郑玲, 樊本汉, 卜晓雪, 潘懿, 董家新, 关伟. 1-乙基-3-甲基咪唑丙氨酸离子液体热力学性质的研究[J]. 物理化学学报, 2015, 31(11): 2036-2042. doi: 10.3866/PKU.WHXB201509111 shu

Citation: ZHENG Ling, FAN Ben-Han, BU Xiao-Xue, PAN Yi, DONG Jia-Xin, GUAN Wei. Study on Thermodynamic Properties of Ionic Liquid 1-Ethyl-3-methylimidazolium Alanine[J]. Acta Physico-Chimica Sinica, 2015, 31(11): 2036-2042. doi: 10.3866/PKU.WHXB201509111 shu

1-乙基-3-甲基咪唑丙氨酸离子液体热力学性质的研究

郑玲 ^1, ,
樊本汉 ^1, ,
卜晓雪 ^1, ,
潘懿 ^1, ,
董家新 ^2, ,
关伟 ^{1,
,}

1.
1 辽宁大学化学院, 沈阳 110036;
2.
2 广西师范大学化学化工学院, 广西桂林 541004

通讯作者: 关伟

基金项目:
国家自然科学基金(21173107) (21173107)

辽宁省高等学校优秀人才支持计划(2015025)资助项目 (2015025)

摘要: 用中和法合成了氨基酸离子液体1-乙基-3-甲基咪唑丙氨酸([C₂mim][Ala]), 并利用恒温环境的溶解反应热量计, 在(288.15±0.01) K-(308.15±0.01) K温度范围内每隔5 K, 测定不同质量摩尔浓度离子液体在水中的溶解焓(Δ_solH_m^θ). 根据Archer的方法, 通过线性拟合得到了该离子液体的标准摩尔溶解焓(Δ_sol), 并计算了其相对表观摩尔溶解焓(^ΦL). 在298.15 K下, 根据Glasser经验方法得到了格子能U_POT = 566 kJ·mol^-1, 并计算了其阴阳离子水化焓值(ΔH⁺ + ΔH^-) = -620 kJ·mol^-1及阴离子水化焓ΔH^-([Ala]^-) = -387 kJ·mol^-1. 此外, 估算了[C₂mim][Ala]水溶液的热容(C_p(sol))和表观摩尔热容(^ΦC_p).

关键词:

离子液体
/ 溶解焓
/ 热容
/ 水化焓
/ 格子能

English

Study on Thermodynamic Properties of Ionic Liquid 1-Ethyl-3-methylimidazolium Alanine

1.
1 College of Chemistry, Liaoning University, Shenyang 110036, P. R. China;
2.
2 College of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin 541004, Guangxi Province, P. R. China

Corresponding author: 关伟

Received Date: 30 July 2015
Fund Project:
国家自然科学基金(21173107)

辽宁省高等学校优秀人才支持计划(2015025)资助项目

Abstract: We synthesized the alanine-based ionic liquid [C₂mim][Ala] (1-ethyl-3-methylimidazolium alanine) by using the neutralization method and characterized it. Using a solution-reaction isoperibol calorimeter, we determined the molar enthalpies of the solution (Δ_solH_m) at various molalities in water from (288.15±0.01) to (308.15±0.01) K in intervals of 5 K. Using Archer's method, we obtained the standard molar enthalpy of solution for [C₂mim][Ala] (Δ_solH_m^θ) and calculated its apparent relative molar enthalpy (^ΦL). Using Glasser's theory of lattice energy, we obtained the lattice energy, U_POT = 566 kJ·mol^-1, the hydration enthalpy of the cation and anion, (ΔH⁺ + ΔH^-) = -620 kJ·mol^-1, and the hydration enthalpy of an anion, ΔH^-([Ala]^-) = -387 kJ·mol^-1 at 298.15 K. Finally, we obtained the heat capacity of aqueous [C₂mim][Ala] (C_p(sol)) and its apparent molar heat capacity (^ΦC_p) at various specific molalities.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

1-乙基-3-甲基咪唑丙氨酸离子液体热力学性质的研究

通讯作者: 关伟

English

Study on Thermodynamic Properties of Ionic Liquid 1-Ethyl-3-methylimidazolium Alanine

Corresponding author: 关伟

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

1-乙基-3-甲基咪唑丙氨酸离子液体热力学性质的研究

通讯作者: 关伟

English

Study on Thermodynamic Properties of Ionic Liquid 1-Ethyl-3-methylimidazolium Alanine

Corresponding author: 关伟

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

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