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题名: Thermal analysis and calorimetric study of 4-dimethylaminopyridine
作者: Shi, Quan;  Tan, Zhi-Cheng;  Di, You-Ying;  Tong, Bo;  Li, Yan-Sheng;  Wang, Shao-Xu
通讯作者: 谭志诚
刊名: JOURNAL OF CHEMICAL AND ENGINEERING DATA
发表日期: 2007-05-01
DOI: 10.1021/je6005423
卷: 52, 期:3, 页:941-947
收录类别: SCI
文章类型: Article
部门归属: 15
项目归属: 1504
产权排名: 1;1
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: 4-Dimethylaminopyridine (DMAP) is an important catalyst. The thermodynamic properties of DMAP were investigated through differential scanning calorimetry, thermogravimetric analysis, adiabatic calorimetry, and combustion calorimetry. The low-temperature heat capacity (C-p,C- m) was measured in the temperature range from (80 to 402) K with a high-precision automated adiabatic calorimeter. The melting temperature (T-m), the molar enthalpy (Delta H-fus(m)), and the entropy (Delta S-fus(m)) of fusion were determined to be ( 387.094 +/- 0.002) K, ( 21.628 +/- 0.144) kJ . mol(-1), and (55.873 +/- 0.372) J . K-1 . mol(-1), respectively. The mole fraction purity of the sample used in the adiabatic calorimetric study was determined to be 0.99964 according to the Van't Hoff equation. The thermodynamic functions [H-T - H-298.15] and [S-T - S-298.15] were derived in the range from (80 to 400) K with temperature interval of 5 K based on the heat capacity measurements. The constant-volume energy and standard molar enthalpy of combustion have been determined, Delta U-c (C7H10N2, cr) = -(4232.20 +/- 0.60) kJ.mol(-1) and Delta H-c(m)0 (C7H10N2, cr) = -(4235.92 +/- 0.60) kJ.mol(-1), by means of a precision oxygen-bomb combustion calorimeter at T = (298.15 +/- 0.001) K. The standard molar enthalpy of formation has been derived, Delta H-f(m)0 (C7H10N2, cr) = (52.20 +/- 1.71) kJ.mol(-1), from the standard molar enthalpy of combustion in combination with other auxiliary thermodynamic quantities through a Hess thermochemical cycle.
关键词[WOS]: SYNTHETIC SAPPHIRE ALPHA-AL2O3 ;  HEAT-CAPACITY ;  THERMODYNAMIC PROPERTIES ;  ASYMMETRIC CATALYSIS ;  4-(DIMETHYLAMINO)PYRIDINE ;  ACYLATION ;  4-DIALKYLAMINOPYRIDINES ;  DMAP
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000246372100052
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/99733
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
2.Liaocheng Univ, Coll Chem & Chem Engn, Liaocheng 252059, Peoples R China
3.Dalian Jiaotong Univ, Coll Environm Sci & Engn, Dalian 116028, Peoples R China
4.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Shi, Quan,Tan, Zhi-Cheng,Di, You-Ying,et al. Thermal analysis and calorimetric study of 4-dimethylaminopyridine[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2007,52(3):941-947.
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