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Low Temperature Heat Capacities of Uracil and 5-Bromouracil
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
2015-03-15
DOI10.3866/PKU.WHXB201501122
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
关键词[WOS]THERMODYNAMIC FUNCTIONS ; DERIVATIVES
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.
语种英语
WOS记录号WOS:000351653100002
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/146126
专题中国科学院大连化学物理研究所
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
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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.
APA Zhang Xiao-Ye,Xue Bin,Cheng Ze,Tan Zhi-Cheng,&Shi Quan.(2015).Low Temperature Heat Capacities of Uracil and 5-Bromouracil.ACTA PHYSICO-CHIMICA SINICA,31(3),412-418.
MLA Zhang Xiao-Ye,et al."Low Temperature Heat Capacities of Uracil and 5-Bromouracil".ACTA PHYSICO-CHIMICA SINICA 31.3(2015):412-418.
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