Low-temperature heat capacities and thermodynamic properties of [Mn.sub.3][.sub.2] x 10[H.sub.2]O

The low-temperature molar heat capacity of crystalline [Mn.sub.3][(HEDTA).sub.2] x 10[H.sub.2]O was measured by temperature-modulated differential scanning calorimetry (TMDSC) for the first time. The thermodynamic parameters such as entropy and enthalpy relative to 298.15 K were calculated based on...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2010-12, Vol.102 (3), p.1155
Main Authors: Jiao, Cheng-Li, Song, Li-Fang, Jiang, Chun-Hong, Zhang, Jian, Si, Xiao- Liang, Qiu, Shu-Jun, Wang, Shuang, Sun, Li-Xian, Xu, Fen, Li, Fen, Zhao, Ji-Jun
Format: Article
Language:English
Subjects:
Calorimetry
Chemical properties
Thermodynamics
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Summary:The low-temperature molar heat capacity of crystalline [Mn.sub.3][(HEDTA).sub.2] x 10[H.sub.2]O was measured by temperature-modulated differential scanning calorimetry (TMDSC) for the first time. The thermodynamic parameters such as entropy and enthalpy relative to 298.15 K were calculated based on the above molar heat capacity data. The compound was characterized by powder XRD, FT-IR spectrum. Moreover, the thermal decomposition characteristics of [Mn.sub.3][(HEDTA).sub.2] x 10[H.sub.2]O were investigated by thermogravimetry-mass spectrometer (TG-MS). The experimental result through TG measurement shows that a three-step mass loss process exists. [H.sub.2]O, C[O.sub.2], NO, and N[O.sub.2] were observed as products for oxidative degradation of [Mn.sub.3][(HEDTA).sub.2] x 10[H.sub.2]O from the MS curves.
ISSN:1388-6150
DOI:10.1007/s10973-010-0879-5