Determination of heat capacities and thermodynamic properties of Al4(OH)2(OCH3)4(H2N-BDC)3
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The molar heat capacities of one–three-dimensional metal–organic frameworks Al4(OH)2(OCH3)4(H2N-BDC)3 (CAU-1) were measured by temperature-modulated differential scanning calorimetry (TMDSC) over the temperature range from 213 to 393 K for the first time. No phase transition or thermal anomaly was observed in the experimental temperature range. The fundamental thermodynamic parameters such as entropy and enthalpy relative to 298.15 K were calculated based on the experimentally determined molar heat capacities. The compound was characterized by elemental analysis, powder XRD, FT-IR spectrum. Moreover, the thermal stabilities and decomposition mechanisms of hydrated phase and dehydrated phase of CAU-1 were investigated by thermogravimetric spectrometer in the temperature range 298–1023 K.
KeywordsCAU-1 Molar heat capacity TG TMDSC
This work was financially supported by the National Natural Science Foundation of China (Nos. 21503129, 61571062, 21572126, 21675109) and Education Department of Henan Province (No. 15A150073).
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