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题名: Low-Temperature Heat Capacities and Thermodynamic Properties of N-Benzyloxycarbonyl-L-3-phenylalanine (C17H17NO4)
作者: Zhao, Jun-Ning1;  Sun, Li-Xian1;  Tan, Zhi-Cheng1, 2
刊名: JOURNAL OF CHEMICAL AND ENGINEERING DATA
发表日期: 2010-10-01
DOI: 10.1021/je1004092
卷: 55, 期:10, 页:4267-4272
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The heat capacities of N-benzyloxycarbonyl-L-3-phenylahmine were measured by means of a fully automated adiabatic calorimeter over the temperature range from (79 to 395) K. A solid liquid phase transition corresponding to the melting process was observed. The temperature, the molar enthalpy, and entropy of the phase transition were determined to be 358.799 K. 31.787 kJ.mol(-1), and 88.594 J.K-1.mol(-1), respectively. The mole fraction purity or the sample used in the adiabatic calorimetric study was determined to be 0.9830 according to the Van't Hoff equation. Two equations of temperature dependence for heat capacities in the solid and liquid state are presented. The thermodynamic functions. (H-T - H-298.15K) and (S-T - S-298.15K). were calculated based on the heat capacity data in the temperature range from (80 to 400) K with an interval of 5 K. The standard molar enthalpies of combustion have been determined to be Delta H-c(m)0(C17H17NO4, s) = -(8308.52 +/- 3.22) kJ.mol(-1), with a precision oxygen-bomb combustion calorimeter at T = 298.15 K. The standard molar enthalpy of formation of the compound has been derived from the enthalpy of combustion, Delta H-f(m)0(C17H17NO4, s) = -(815.05 +/- 0.67) kJ.mol(-1). The thermal stability of Me compound was further studied using TG, and DSC, and a possible mechanism for thermal decomposition was suggested.
关键词[WOS]: ADIABATIC CALORIMETER ;  SMALL SAMPLES
语种: 英语
WOS记录号: WOS:000282848400023
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142013
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, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, China Ion Liquid Lab Lab, Dalian 116023, Peoples R China

Recommended Citation:
Zhao, Jun-Ning,Sun, Li-Xian,Tan, Zhi-Cheng. Low-Temperature Heat Capacities and Thermodynamic Properties of N-Benzyloxycarbonyl-L-3-phenylalanine (C17H17NO4)[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2010,55(10):4267-4272.
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