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Thermochemistry of Alkyl Pyridinium Bromide Ionic Liquids: Calorimetric Measurements and Calculations
Tong, Bo3; Liu, Qing-Shan1; Tan, Zhi-Cheng1,2; Welz-Biermann, Urs1
刊名JOURNAL OF PHYSICAL CHEMISTRY A
2010-03-25
DOI10.1021/jp9047538
114期:11页:3782-3787
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
研究领域[WOS]Chemistry ; Physics
关键词[WOS]PHYSICOCHEMICAL PROPERTIES ; THERMODYNAMIC PROPERTIES ; DIRECT ELECTROCHEMISTRY ; CARBON NANOTUBES ; NATURAL POLYOLS ; HEAT-CAPACITIES ; SURFACE-TENSION ; IDENTIFICATION ; CATALYSIS ; DENSITY
英文摘要Two ionic liquids, 1-ethylpyridinium bromide (EPBr) and 1-propylpyridinium bromide (PPBr), were prepared and the structures were characterized by (1)H NMR. The thermodynamic properties of EPBr and PPBr were studied with adiabatic calorimetry (AC) and thermogravimatric analysis (TG-DTG). The beat capacity was precisely Measured ill the temperature range from 78 to 410 K by Means of a fully automated adiabatic calorimeter. For EPBr, the melting temperature, enthalpy, and entropy of solid-liquid phase transition were determined to be 391.31 +/- 0.28 K, 12.77 +/- 0.09 kJ.mol(-1), and 32.63 +/- 0.22 J.K(-1).mol(-1), respectively, and for PPBr they were 342.83 +/- 0.69 K, 10.97 +/- 0.05 kJ.mol(-1), and 32.00 +/- 0.10 J.K(-1).mol(-1), respectively. The thermodynamic functions (H(T)(0)-H(298.15)(0)) and (S(T)(0)-S(298.15)(0)) were derived from the heat capacity data in the experimental temperature range with an interval of 5 K. The thermostablility of the compounds Was further studied by TGA measurements. The phase change behavior and thermodynamic properties were compared and estimated in it series of alkyl pyridinium bromide ionic liquids. Results indicate that EPBr has higher melting and decomposition temperature. as well as phase transition enthalpy and entropy but lower heat capacity than PPBr due to their different molecular structures.
语种英语
WOS记录号WOS:000275707800007
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被引频次:32[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142175
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, China Ion Liquid Lab, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
3.Dalian Univ Technol, Sch Chem Engn, Dept Chem, Dalian 116023, Peoples R China
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GB/T 7714
Tong, Bo,Liu, Qing-Shan,Tan, Zhi-Cheng,et al. Thermochemistry of Alkyl Pyridinium Bromide Ionic Liquids: Calorimetric Measurements and Calculations[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2010,114(11):3782-3787.
APA Tong, Bo,Liu, Qing-Shan,Tan, Zhi-Cheng,&Welz-Biermann, Urs.(2010).Thermochemistry of Alkyl Pyridinium Bromide Ionic Liquids: Calorimetric Measurements and Calculations.JOURNAL OF PHYSICAL CHEMISTRY A,114(11),3782-3787.
MLA Tong, Bo,et al."Thermochemistry of Alkyl Pyridinium Bromide Ionic Liquids: Calorimetric Measurements and Calculations".JOURNAL OF PHYSICAL CHEMISTRY A 114.11(2010):3782-3787.
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