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题名: Calorimetric study and thermal analysis of crystalline nicotinic acid
作者: Wang, SX;  Tan, ZC;  Di, YY;  Xu, F;  Wang, MH;  Sun, LX;  Zhang, T
关键词: adiabatic calorimetry ;  DSC ;  heat capacity ;  nicotinic acid ;  phase transition ;  TG-DTG
刊名: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
发表日期: 2004
卷: 76, 期:1, 页:335-342
收录类别: SCI
文章类型: Article
项目归属: 1504,1501
产权排名: 1;1
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: As one primary component of Vitamin B-3, nicotinic acid [pyridine 3-carboxylic acid] was synthesized, and calorimetric study and thermal analysis for this compound were performed. The low-temperature heat capacity of nicotinic acid was measured with a precise automated adiabatic calorimeter over the temperature rang from 79 to 368 K. No thermal anomaly or phase transition was observed in this temperature range. A solid-to-solid transition at T-trs = 451.4 K, a solid-to-liquid transition at T-fus = 509.1 K and a thermal decomposition at T-d = 538.8 K were found through the DSC and TG-DTG techniques. The molar enthalpies of these transitions were determined to be Delta(trs)H(m =) 0.81 kJ mol(-1), Delta(fus)H(m) 27.57 kJ mol(-1) and Delta(d)H(m) = 62.38 kJ mol(-1), respectively, by the integrals of the peak areas of the DSC curves.
关键词[WOS]: HEAT-CAPACITY
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000221298100037
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81475
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, Thermochem Lab, Dalian 116023, Peoples R China

Recommended Citation:
Wang, SX,Tan, ZC,Di, YY,et al. Calorimetric study and thermal analysis of crystalline nicotinic acid[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2004,76(1):335-342.
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