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Heat capacity and thermodynamical properties of the crystal of [RE2(Glu)(2)(H2O)(8)](ClO4)(4)center dot H2O (RE = Nd, Eu, Dy)
Wu XinMin1; Li Wei1; Tan ZhiCheng2; Qu SongSheng3
关键词Complex Of Rare Earth Low-temperature Heat Capacity [Re2(Glu)(2)(H2o)(8)](Clo4)(4)Center Dot H2o (Re= Nd Standard Enthalpy Of Formation Eu Glu = Glutamic Acid) Dy
刊名SCIENCE IN CHINA SERIES B-CHEMISTRY
2009-07-01
DOI10.1007/s11426-009-0065-4
52期:7页:862-867
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Multidisciplinary
研究领域[WOS]Chemistry
关键词[WOS]RARE-EARTH ; AMINO-ACIDS ; THERMOCHEMISTRY
英文摘要Thermodynamical data of rare earth complexes with amino acid are important for engineering chemistry and fundamental chemistry. However, they have rarely been reported. In this work, a series of crystalline complexes of rare earth perchlorate coordinated with glutamic acid have been synthesized in water medium, and their thermodynamical data, including the heat capacity in low temperature range and the standard enthalpy of formation, were determined. These complexes were identified to be [RE2(Glu)(2)(H2O)(8)](ClO4)(4)center dot H2O (RE = Nd, Eu, Dy) by using thermogravimetric analysis (TG), differential thermal analysis (DTA), and chemical and elementary analyses. Their purity has been determined. No melting points were observed for all the three complexes. The heat capacity of the complexes was measured by an adiabatic calorimeter from 79 to 370 K. Abnormal heat capacity values were detected for two of the complexes and the decomposition range of one complex was found. The temperature, enthalpy change and entropy change of the decomposition processes of the three complexes were calculated. The polynomial equations of heat capacity in the experimental temperature range have been obtained by least squares fitting. The standard enthalpy of formation was determined by an isoperibol reaction calorimeter at 298.15 K.
语种英语
WOS记录号WOS:000267396300002
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/141557
专题中国科学院大连化学物理研究所
作者单位1.Beijing Inst Petrochem Technol, Dept Chem Engn, Beijing 102617, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
3.Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China
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GB/T 7714
Wu XinMin,Li Wei,Tan ZhiCheng,et al. Heat capacity and thermodynamical properties of the crystal of [RE2(Glu)(2)(H2O)(8)](ClO4)(4)center dot H2O (RE = Nd, Eu, Dy)[J]. SCIENCE IN CHINA SERIES B-CHEMISTRY,2009,52(7):862-867.
APA Wu XinMin,Li Wei,Tan ZhiCheng,&Qu SongSheng.(2009).Heat capacity and thermodynamical properties of the crystal of [RE2(Glu)(2)(H2O)(8)](ClO4)(4)center dot H2O (RE = Nd, Eu, Dy).SCIENCE IN CHINA SERIES B-CHEMISTRY,52(7),862-867.
MLA Wu XinMin,et al."Heat capacity and thermodynamical properties of the crystal of [RE2(Glu)(2)(H2O)(8)](ClO4)(4)center dot H2O (RE = Nd, Eu, Dy)".SCIENCE IN CHINA SERIES B-CHEMISTRY 52.7(2009):862-867.
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