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首页> 外文期刊>Journal of Thermal Analysis and Calorimetry >Determination of heat capacities and thermodynamic properties of two structurally unrelated but isotypic calcium and manganese(II) 2,6-naphthalene dicarboxylate-based MOFs
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Determination of heat capacities and thermodynamic properties of two structurally unrelated but isotypic calcium and manganese(II) 2,6-naphthalene dicarboxylate-based MOFs

机译：两种结构无关但同型的钙和锰（II）2,6-萘二甲酸二甲酯的热容和热力学性质的确定

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摘要

Two metal-organic frameworks, Ca(2,6-NDC)(DMF) (1) and Mn3(2,6-NDC)3(DMF)4 (2) (where 2,6-NDC = 2,6-naphthalene dicarboxylate and DMF = N,N′-dimethylformamide) have been solvothermally synthesized under optimized conditions and characterized by X-ray powder diffraction, elemental analysis, FT-IR spectroscopy, and TG analysis. The thermal decomposition characteristics were investigated under air atmosphere from 300 to 1,170 K (for 1) and from 300 to 971 K (for 2). The molar heat capacities were measured from 198 to 548 K (for 1) and from 198 to 448 K (for 2) by temperature modulated differential scanning calorimetry (TMDSC) for the first time. The fundamental thermodynamic parameters such as entropy and enthalpy variations with temperature were calculated based on the experimentally determined molar heat capacities.
机译：两种金属有机框架Ca（2,6-NDC）（DMF）（1）和Mn 3 （2,6-NDC） 3 （DMF） 4 （2）（其中2,6-NDC = 2,6-萘二甲酸二甲酯和DMF = N，N'-二甲基甲酰胺）已在优化条件下溶剂热合成，并通过X射线粉末衍射，元素分析，FT-IR光谱和TG分析。在300至1,170 K（对于1）和300至971 K（对于2）的空气气氛下研究了热分解特性。首次通过温度调制差示扫描量热法（TMDSC）在198至548 K（对于1）和198至448 K（对于2）中测量了摩尔热容。基于实验确定的摩尔热容，计算了基本的热力学参数，例如熵和焓随温度的变化。

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