ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2018,Vol.34>> Issue(2)>> 194-200     doi: 10.3866/PKU.WHXB201707262         中文摘要
Measurement of Vapor Pressure and Vaporization Enthalpy for Ionic Liquids 1-Hexyl-3-methylimidazolium Threonine Salt[C6mim][Thr]by Isothermogravimetric Analysis
TONG Jing, QU Ye, JING Liqiang, LIU Lu, LIU Chunhui
College of Chemistry, Liaoning University, Shenyang 110036, P. R. China
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The amino acid ionic liquid (AAIL) 1-hexyl-3-methylimidazolium threonine salt,[C6mim] [Thr], was prepared by the neutralization method and its structure was confirmed by 1H and 13C NMR spectroscopy. Using benzoic acid as the reference material, the vapor pressure and evaporation enthalpy △glHmθ (Tav) of[C6mim] [Thr] were determined by isothermogravimetric analysis at the average temperature (Tav=438.15 K) and △glHmθ (Tav) was found to be (128.5 ±6.0) kJ·mol-1. Using Verevkin's method, the difference between the heat capacities of the vapor and liquid phases, △glCpmθ, was calculated to be -70.8 J·K-1·mol-1. Subsequently, the enthalpy of vaporization for AAIL[C6mim] [Thr] at different temperatures was determined based on the reference enthalpy of vaporization at 298.15 K, △glHmθ (298.15 K)=138.4 kJ·mol-1. This value is 1.6 kJ·mol-1 higher than that predicted by our theoretical model and less than the experimental error (±3.0 kJ·mol-1) of the isothermogravimetric method. These results show that our theoretical model for determining the evaporation enthalpy of ILs is reasonable. In terms of the Clausius-Clapeyron equation, the hypothetical normal boiling point, Tb, was estimated to be 522.07 K. Thus, the evaporation entropy, △glSmθ (T), and the evaporation Gibbs free energy, △glGmθ (T), of[C6mim] [Thr] could be determined for different temperatures. These results showed that △glGmθ (T) decreases as the temperature increases, the evaporation entropy increases with increaseing temperature. Furthermore, the latter is the driving force in the evaporation process of the AAIL[C6mim] [Thr].

Keywords: Ionic liquid   Isothermogravimetrical analysis   Enthalpy of vaporization   Vapor pressure   Threonine  
Received: 2017-06-16 Accepted: 2017-07-11 Publication Date (Web): 2017-07-26
Corresponding Authors: TONG Jing Email:

Fund: The project was supported by the National Natural Science Foundation of China (21273003)

Cite this article: TONG Jing, QU Ye, JING Liqiang, LIU Lu, LIU Chunhui. Measurement of Vapor Pressure and Vaporization Enthalpy for Ionic Liquids 1-Hexyl-3-methylimidazolium Threonine Salt[C6mim][Thr]by Isothermogravimetric Analysis[J]. Acta Phys. -Chim. Sin., 2018,34 (2): 194-200.    doi: 10.3866/PKU.WHXB201707262

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64. CAO Hai, JIANG Jian, ZHU Xue-Feng, DUAN Peng-Fei, LIU Ming-Hua.Interfacial Assembly of Diethyl Ester Glutamic Acid Terminated Bolaamphiphile at the Air/Water Interface: Chiral Interaction and Morphology[J]. Acta Phys. -Chim. Sin., 2010,26(07): 1842-1846
65. LIU Qing-Shan, YANG Miao, TAN Zhi-Cheng, WELZ-BIERMANN Urs.Estimation and Prediction of the Physicochemical Properties of Imidazolium-Based Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2010,26(06): 1463-1467
66. LIANG Rui, YANG Mei-Rong, ZHOU Qing-Xiang.Thermal Stability, Equilibrium Vapor Pressure and Standard Enthalpy of Vaporization of 1-Butyl-3-methylimidazolium Tetrafluoroborate[J]. Acta Phys. -Chim. Sin., 2010,26(06): 1468-1472
67. ZHAO Di, HUANG Qing, JIN Xian-Bo, WEI Xian-Jun, CHEN George Z..Capacitance at the Electrode/Ionic Liquid Interface[J]. Acta Phys. -Chim. Sin., 2010,26(05): 1239-1248
68. LI Xue-Liang, CHEN Jie-Jie, LUO Mei, CHEN Xiang-Ying, LI Pei-Pei.Quantum Chemical Calculation of Hydroxyalkyl Ammonium Functionalized Ionic Liquids for Absorbing SO2[J]. Acta Phys. -Chim. Sin., 2010,26(05): 1364-1372
69. CUI Wen-Yu, AN Mao-Zhong, YANG Pei-Xia.Preparation of an Ionic Liquid Gel Polymer Electrolyte and Its Compatibility with a LiFePO4 Cathode[J]. Acta Phys. -Chim. Sin., 2010,26(05): 1233-1238
70. WANG Wei, LV Rong, YU An-Chi.Low Frequency Spectrumof Ionic Liquid [bmim][PF6] Studied by Femtosecond Optically Heterodyne-Detected Optical Kerr Effect Spectroscopy and Low Frequency Raman Spectroscopy[J]. Acta Phys. -Chim. Sin., 2010,26(04): 964-970
71. YUAN Li-Yong, PENG Jing, LI Jiu-Qiang, ZHAI Mao-Lin.Radiation-Induced Changes of Phase Behavior and Fluorescence Properties of the Ionic Liquids [C4mim][PF6] and [C4mim][NTf2][J]. Acta Phys. -Chim. Sin., 2010,26(04): 981-987
72. YUAN Xiao, LOU Shu-Jie, KOU Yuan.Ionic Liquid and Water: Making Nanoparticle Catalysis More Efficient and Greener[J]. Acta Phys. -Chim. Sin., 2010,26(04): 908-914
73. WANG Wei-Bin, YIN Jian-Zhong, SUN Li-Hua, FENG En-Min.Molecular Dynamics Simulation of Thermodynamic Properties for CO2/Ionic Liquid Systems[J]. Acta Phys. -Chim. Sin., 2009,25(11): 2291-2295
74. WU Yang, ZHANG Tian-Tian, YU Ning.Interaction between 1-Ethyl-3-Methyl-Imidazolium Cation and Asparagine Anion[J]. Acta Phys. -Chim. Sin., 2009,25(08): 1689-1696
75. ZHAI Cui-Ping, LIU Xue-Jun, ZHAO Yang, WANG Jian-Ji.NMR Study on the Aggregation of [C4mim][BF4] in D2O and CDCl3[J]. Acta Phys. -Chim. Sin., 2009,25(06): 1185-1189
76. YAN Chao-Qun, WAN Hui, GUAN Guo-Feng.Prediction of Melting Points for 1,3-Disubstituent Imidazolium Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2008,24(12): 2198-2202
77. WANG Xiao-Lu; WAN Hui; GUAN Guo-Feng.Structure and Interaction of Ion-Pairs of [EPy]Cl and [EPy]Br in Gas and Liquid Phases[J]. Acta Phys. -Chim. Sin., 2008,24(11): 2077-2082
78. YANG Pei-Xia; AN Mao-Zhong; SU Cai-Na; WANG Fu-Ping.Electrodeposition Behaviors of Pure Cobalt in Ionic Liquid[J]. Acta Phys. -Chim. Sin., 2008,24(11): 2032-2036
79. ZHENG Yong-Jun; ELI Wumanjiang.Phase Behavior of Tween80/BmimPF6/Alcohol/Toluene Systems[J]. Acta Phys. -Chim. Sin., 2008,24(11): 2143-2148
80. ZHANG Xu-Zhi; JIAO Kui.Single-Walled Carbon Nanotubes and RoomTemperature Ionic Liquid Composite Film Modified Electrode[J]. Acta Phys. -Chim. Sin., 2008,24(08): 1439-1444
81. GAO Li-Xia; WANG Li-Na; QI Tao; LI Yu-Ping; CHU Jing-Long; QU Jing-Kui.Electrodeposition of Aluminium from AlCl3/Et3NHCl Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2008,24(06): 939-944
82. LI Wei; RONG Hua; WU Xin-Min; CHEN Zhong-Yuan.Microwave Synthesis, Characterization and Theoretical Study of para-Toluenesulfonic Acid Threonine Salt and Its Ester Derivatives[J]. Acta Phys. -Chim. Sin., 2008,24(05): 868-872
83. SUN Guo-Hua; LI Kai-Xi; FAN Hui; GU Jian-Yu; LI Qiang; LIU Yue.Eelectrochemical Performance of Capacitors Using [BMIm]BF4/Fc as Electrolyte[J]. Acta Phys. -Chim. Sin., 2008,24(01): 103-108
84. MA Chun-An; WANG Xiao-Juan; LI Guo-Hua; LI Mei-Chao; CHEN Song.Electroreduction Characteristics of Nitromethane in Ionic Liquid BMImBF4[J]. Acta Phys. -Chim. Sin., 2007,23(11): 1719-1722
85. LEI Sheng; ZHANG Jing; HUANG Jian-Bin.Promotion of the Surface Activity and Aggregation Ability of Sodium Dodecylsulfate in Aqueous Solution by Ionic Liquid 1-butyl-3-methyl-imidazolium Tetrafluoroborate[J]. Acta Phys. -Chim. Sin., 2007,23(11): 1657-1661
86. WANG Jin-Bo; MING Fang-Yong; JIANG Wei-Dong; FAN Guang-Yin; LIU De-Rong; CHEN Hua; LI Xian-Jun.Asymmetric Hydrogenation of Acetophenone and Its Derivatives Catalyzed by Ruthenium Nanoparticles in Ionic Liquid Media[J]. Acta Phys. -Chim. Sin., 2007,23(09): 1381-1386
87. SUN Wei; GAO Rui-Fang; WANG Dan-Dan; JIAO Kui.Direct Electrochemistry of Hemoglobin at Room Temperature Ionic Liquid [BMIM]PF6 Modified Carbon Paste Electrode[J]. Acta Phys. -Chim. Sin., 2007,23(08): 1247-1251
88. YAN Zhi-Ying; WU Li-Yan; SUN Gui-Xiang; ZHANG Ning; ZHENG Wen-Jun.Structural Characterization of Nanocrystalline TiO2 fromIonic Liquid-Water Solvent Mixture and Its Photocatalytic Activity[J]. Acta Phys. -Chim. Sin., 2007,23(07): 1032-1036
89. LI Shu; LIU Lei; CAO Zhen; WANG Ji-Qiang; YAN Tian-Ying.Molecular Dynamics Simulation on a Eutectic Systemof LiTFSI/Urea[J]. Acta Phys. -Chim. Sin., 2007,23(07): 983-986
90. MA Chun-An; CHEN Song; CHU You-Qun; MAO Xin-Biao.Electrochemical Reduction of Nitrobenzene in Ionic Liquid BMimBF4-H2O[J]. Acta Phys. -Chim. Sin., 2007,23(04): 575-580
91. MA Wei;SUN Deng-Ming.Electrocatalytical Oxidation of Dopamine and Epinephrine at Poly(L-threonine) Modified Electrode[J]. Acta Phys. -Chim. Sin., 2007,23(03): 332-336
92. LIN Qi;FU Hai-Yan;YUAN Mao-Lin;CHEN Hua;LI Xian-Jun.Carbonylation of Aryl Halide Catalyzed by Active-carbon Supported Ionic Liquid-phase Palladium Catalyst[J]. Acta Phys. -Chim. Sin., 2006,22(10): 1272-1276
93. LI Xue-Hui;JIANG Yan-Bin;ZHANG Lei;LI Rong.Synthesis and Characterization of N-ester Appended Pyridine Task-specific Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2006,22(06): 747-751
94. Ding Yun-Sheng;Wang Seng-Shan;Zha Min;Wang Zhi-Gang.Adsorption and Aggregative Structures of an Organic Cation [C18mim] of the Ionic Liquid in the Interlayer of Montmorillonite[J]. Acta Phys. -Chim. Sin., 2006,22(05): 548-551
95. LI Xue-Hui;ZHANG Lei;WANG Le-Fu;TANG Ying-Biao.Characterization of N-carboxyl Appended Pyridine Task-Specific Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2006,22(04): 430-435
96. LIN Qi;FU Hai-Yan;XUE Fang;YUAN Mao-Lin;CHEN Hua;LI Xian-Jun.Hydroformylation of Long-chain Olefins Catalyzed by Rhodium-Phosphine Complexes in New Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2006,22(04): 465-469
97. ZHAI Cui-Ping;WANG Jian-Ji;XUAN Xiao-Peng;WANG Han-Qing.NMR Study on the Interactions of Ionic Liquid with Acetone[J]. Acta Phys. -Chim. Sin., 2006,22(04): 456-459
98. GENG Wei-guo; LI Xue-hui; WANG Le-fu; DUAN Hong-li; PAN Wei-ping.Acidic Characterization of Polycarboxyl Imidazolium Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2006,22(02): 230-233
99. TONG Jing; ZHANG Qing-guo; HONG Mei; YANG Jia-zhen.Thermodynamic Properties of Ionic Liquid BMIAlCl4[J]. Acta Phys. -Chim. Sin., 2006,22(01): 71-75
100. WU Xiao-ping; LIU Zhi-ping; WANG Wen-chuan.Molecular Dynamics Simulation of Gas Solubility in Room Temperature Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2005,21(10): 1138-1142
101. WU Xiao-ping; LIU Zhi-ping.Computer Simulation Study of the Mixtures of Room Temperature Ionic Liquid [bmim][BF4] and Water[J]. Acta Phys. -Chim. Sin., 2005,21(09): 1036-1041
102. CAO Jie-ming; WANG Jun; FANG Bao-qing; ZHENG Ming-bo; LU Hong-xia; CHANG Xin; WANG Hai-yan.Synthesis and Characterization of ZnO Nanomaterials with Different Morphologies in Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2005,21(06): 668-672
103. PAN Xu; DAI Song-yuan; WANG Kong-jia; SHI Cheng-wu; GUO Li.Development and Application of Electrolyte based on Ionic Liquid in Dye-sensitized Solar Cells[J]. Acta Phys. -Chim. Sin., 2005,21(06): 697-702
104. WANG Yong; LI Hao-Ran; WU Tao; WANG Cong-Min; HAN Shi-Jun.Reaction Mechanism Study for the Synthesis of Alkylimidazolium-based Halide Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2005,21(05): 517-522
105. WANG Xiao-Hua; TAO Guo-Hong; WU Xiao-Mu; KOU Yuan.Investigation of the Acidity of Ionic Liquids by IR Spectroscopy[J]. Acta Phys. -Chim. Sin., 2005,21(05): 528-533
106. PU Min; CHEN Biao-Hua; LI Hui-Ying; LIU Kun-Hui.DFT Studies on Reaction Mechanism of the Double Bond Isomerization of Butene Catalyzed by 1-ethyl-3-methyl-imidazolium of the Ionic Liquid (II)[J]. Acta Phys. -Chim. Sin., 2005,21(04): 383-387
107. Li Xue-Hui; Zhang Lei; Li Qiong; Geng Wei-Guo; Ye Yu-Jia; Wang Le-Fu.TGA-FTIR Study of 1-n-butyl-3-methylimidazolium Bromide Ionic Liquid[J]. Acta Phys. -Chim. Sin., 2004,20(12): 1465-1468
108. Zhang Zhi-Heng; Guan Wei; Yang Jia-Zhen; Tan Zhi-Cheng; Sun Li-Xian.The Standard Molar Enthalpy of Formation of Room Temperature Ionic Liquid EMIES[J]. Acta Phys. -Chim. Sin., 2004,20(12): 1469-1471
109. Piao Ling-Yu;Han Yang;Kou Yuan.The Reuse of Acidic Ionic Liquids as Catalysts in Diphenyl Oxide Alkylation with Dodecene[J]. Acta Phys. -Chim. Sin., 2004,20(09): 1083-1088
110. Pu Min;Liu Kun-Hui;Li Hui-Ying;Chen Biao-Hua.DFT Studies on Reaction Mechanism of the Double Bond Isomerization of Butene Catalyzed by 1-ethyl-3-methyl-lmidazolium of the Ionic Liquid[J]. Acta Phys. -Chim. Sin., 2004,20(08): 826-830
111. Zhang Sheng-Mao;Zhang Chun-Li;Zhang Jing-Wei;Zhang Zhi-Jun;Dang Hong-Xin;Wu Zhi-Shen;Liu Wei-Min.Preparation of Silver Nanoparticles in Room Temperature Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2004,20(05): 554-556
112. Zhao Chang-Wei;Ma Pei-Sheng;Zhu Chun-Ying;Zhao Shu-Zhi.Volumetric Properties of L-threonine in Aqueous Glucose, Sucrose and L-ascorbic Acid Solutions[J]. Acta Phys. -Chim. Sin., 2004,20(01): 15-20
113. Hai Ming-Tan, Gao Jie, Han Bu-Xing, Yan Hai-Ke, Liu Yun, Han Qi-Yong.Vapour Pressure and Surface Tension of Aqueous Solution SDS-PEO[J]. Acta Phys. -Chim. Sin., 1998,14(08): 747-751
114. Han Bu-Xing; Yan Hai-Ke; Hu Ri-Heng.Vapour Pressure of n-Heptane-n-Octane and n-Octane-iso-Octane Binary Mixtures[J]. Acta Phys. -Chim. Sin., 1993,9(03): 421-423
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