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题名: Low-temperature heat capacity and thermodynamic properties of [Re-2(Ile)(4)(H2O)(8)](ClO4)(6) (Re = Nd, Er, Ile = isoleucine)
作者: Lan, XZ;  Tan, ZC;  Liu, BP;  Nan, ZD;  Sun, LX;  Xu, F
关键词: rare-earth complex ;  isoleucine ;  [Nd-2(Ile)(4)(H2O)(8)](ClO4)(6) ;  [Er-2(Ile)(4)(H2O)(8)](ClO4)(6) ;  heat capacity ;  thermal stability ;  TG analysis
刊名: THERMOCHIMICA ACTA
发表日期: 2003-06-03
DOI: 10.1016/S0040-6031(02)00573-7
卷: 402, 期:1-2, 页:183-191
收录类别: SCI
文章类型: Article
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: The heat capacities of two kinds of rare-earth element solid complexes with isoleucine [Re-2(Ile)(4)(H2O)(8)](ClO4)(6) (where Re = Nd, Er, and Ile = isoleucine) have been measured by an automatic adiabatic calorimeter in the temperature range from 80 to 370 K. Two solid-solid phase transitions were found from the C-p curve of Nd formed complex in the range of 165-175 K with a peak temperature of 167.88 K and in the range of 195-210 K with a peak temperature of 202.13 K. The corresponding molar enthalpies of these phase transitions were determined to be 404.61 J mol(-1) and 2.955 kJ mol(-1), respectively. One solid-solid phase transition was found for the Er formed complex in the range of 190-205 K with a peak temperature of 193.42 K. The corresponding molar enthalpy of this transition was 14.11 kJ mol(-1). Smooth heat capacities and thermodynamic functions relative to the standard state (298.15 K), H-T - H-298.15, S-T - S-298.15 and -[G(T) - G(298.15)], of the two compounds, were calculated on basis of experimental heat capacity data. Possible mechanisms of thermal decompositions for the pair of compounds were suggested according to the thermogravimetric (TG) analysis. (C) 2002 Elsevier Science B.V. All rights reserved.
语种: 英语
WOS记录号: WOS:000183516100020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138376
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:
Lan, XZ,Tan, ZC,Liu, BP,et al. Low-temperature heat capacity and thermodynamic properties of [Re-2(Ile)(4)(H2O)(8)](ClO4)(6) (Re = Nd, Er, Ile = isoleucine)[J]. THERMOCHIMICA ACTA,2003,402(1-2):183-191.
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