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Low-temperature heat capacities and thermodynamic properties of Mn3(HEDTA)2·10H2O

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Abstract

The low-temperature molar heat capacity of crystalline Mn3(HEDTA)2·10H2O 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 Mn3(HEDTA)2·10H2O were investigated by thermogravimetry–mass spectrometer (TG–MS). The experimental result through TG measurement shows that a three-step mass loss process exists. H2O, CO2, NO, and NO2 were observed as products for oxidative degradation of Mn3(HEDTA)2·10H2O from the MS curves.

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Acknowledgements

The authors gratefully acknowledge the financial support for this study from the National Natural Science Foundation of China (No. 20833009, 20903095, 20873148, and U0734005) and the National Basic Research Program (973 program) of China (2010CB631303).

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Correspondence to Li-Xian Sun.

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Jiao, CL., Song, LF., Jiang, CH. et al. Low-temperature heat capacities and thermodynamic properties of Mn3(HEDTA)2·10H2O. J Therm Anal Calorim 102, 1155–1160 (2010). https://doi.org/10.1007/s10973-010-0879-5

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