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题名: Thermodynamic investigation of room temperature ionic liquid - The heat capacity and thermodynamic functions of BMIPF6
作者: Zhang, Z. H.2;  Cui, T.;  Zhang, J. L.2;  Xiong, H.2;  Li, G. P.2;  Sun, L. X.1;  Xu, F.3;  Cao, Z.4;  Li, F.5, 6;  Zhao, J. J.5, 6
关键词: Room temperature ionic liquid ;  BMIPF6 ;  Heat capacity ;  Adiabatic calorimetry ;  Glass translation ;  Thermodynamic function
刊名: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
发表日期: 2010-09-01
DOI: 10.1007/s10973-009-0610-6
卷: 101, 期:3, 页:1143-1148
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical ;  Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The molar heat capacities of the room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluoroborate (BMIPF6) weremeasured by an adiabatic calorimeter in temperature range from 80 to 390 K. The dependence of the molar heat capacity on temperature is given as a function of the reduced temperature (X) by polynomial equations, CP, m (J K-1 mol(-1)) = 204.75 + 81.421X-23.828 X-2 + 12.044X(3) + 2.5442X(4) [X = (T - 132.5)/52.5] for the solid phase (80-185 K), C-P,C-m (J K-1 mol(-1)) = 368.99 + 2.4199X + 1.0027X(2) + 0.43395X(3) [X = (T -230)/35] for the glass state (195 - 265 K), and C-P,C-m (J K-1 mol(-1)) = 415.01 + 21.992X - 0.24656X(2) + 0.57770X(3) [X = (T - 337.5)/52.5] for the liquid phase (285-390 K), respectively. According to the polynomial equations and thermodynamic relationship, the values of thermodynamic function of the BMIPF6 relative to 298.15 K were calculated in temperature range from 80 to 390 K with an interval of 5 K. The glass transition of BMIPF6 was measured to be 190.41 K, the enthalpy and entropy of the glass transition were determined to be Delta H-g = 2.853 kJ mol(-1) and Delta S-g = 14.98 J K-1 mol(-1), respectively. The results showed that the milting point of the BMIPF6 is 281.83 K, the enthalpy and entropy of phase transition were calculated to be Delta(Hm) = 20.67 kJ mol(-1) and Delta(Sm) = 73.34 J K-1 mol(-1).
关键词[WOS]: MOLTEN-SALTS ;  THERMAL-ANALYSIS ;  SOLVENTS ;  ACID ;  COMPLEXES ;  CATALYSIS ;  ENTHALPY ;  BEHAVIOR ;  CHLORIDE ;  WATER
语种: 英语
WOS记录号: WOS:000281256500045
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141846
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Thermochem Lab, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.PetroChina Pipeline Co, Inst Appl Chem, R&D Ctr, Langfang 065000, Hebei, Peoples R China
3.Liaoning Normal Univ, Fac Chem & Chem Engn, Dalian 116029, Peoples R China
4.Changsha Univ Sci & Technol, Sch Chem & Environm Engn, Changsha 410076, Hunan, Peoples R China
5.Dalian Univ Technol, Sch Phys & Optoelect Technol, Dalian 116024, Peoples R China
6.Dalian Univ Technol, Coll Adv Sci & Technol, Dalian 116024, Peoples R China

Recommended Citation:
Zhang, Z. H.,Cui, T.,Zhang, J. L.,et al. Thermodynamic investigation of room temperature ionic liquid - The heat capacity and thermodynamic functions of BMIPF6[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2010,101(3):1143-1148.
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