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题名: Low Temperature Heat Capacities of Uracil and 5-Bromouracil
作者: Zhang Xiao-Ye1, 2;  Xue Bin1;  Cheng Ze1, 2;  Tan Zhi-Cheng2;  Shi Quan2
关键词: Uracil ;  5-Bromouracil ;  Heat capacity ;  Physical property measurement system ;  Thermodynamic function
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 2015-03-15
DOI: 10.3866/PKU.WHXB201501122
卷: 31, 期:3, 页:412-418
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The heat capacities of uracil and 5-bromouracil were measured using a quantum design physical property measurement system (PPMS) in the temperature range of 1.9-300 K. The experimental results indicate that the heat capacities of the two compounds increase with increasing temperature, and no thermal anomalies are observed across the whole temperature range studied. The heat capacity values of 5-bromouracil are larger than those of uracil as it has a higher molecular weight but a similar molecular structure. The heat capacities were fitted to theoretical models and the thermodynamic functions were calculated based on the curve fitting. The standard molecular entropies at 298.15 K were determined to be (132.48 +/- 1.32) and (165.39 +/- 1.65) J.K-1.mol(-1) for uracil and 5-bronnouracil, respectively.
关键词[WOS]: THERMODYNAMIC FUNCTIONS ;  DERIVATIVES
语种: 英语
WOS记录号: WOS:000351653100002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146126
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.Shenyang Univ Technol, Sch Petrochem Engn, Liaoyang 111003, Liaoning Provin, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab,Dalian Natl Lab Clean Energy, Liaoning Prov Key Lab Thermochem Energy & Mat, Dalian 116023, Liaoning Provin, Peoples R China

Recommended Citation:
Zhang Xiao-Ye,Xue Bin,Cheng Ze,et al. Low Temperature Heat Capacities of Uracil and 5-Bromouracil[J]. ACTA PHYSICO-CHIMICA SINICA,2015,31(3):412-418.
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