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热分析是在程序控制温度下自动连续跟踪物质的物理性质与温度关系的一类技术，特别是热重法和差热分析或差示扫描量热法配合红外光谱分析，可以用来研究有机化合物的热稳定性、相转变和热分解机理。由卟啉衍生出来的卟啉化合物，尤其是构成叶绿素和血红素的金属卟啉化合物，由于其特殊的性能而引起人们的极大重视，进行广泛而深入的研究。本文对热分析方法作一简单介绍，报导用热重法和差热分析法对新合成的金属卟啉化合物、取代苯基卟啉化合物热分解机理及反应动力学的实验研究。实验结果表明：不同类型的卟啉化合物由于取代基及与卟啉环配位的金属离子不同，其热稳定性、分解反应机理、分解反应活化能不同，且表现不同的变化规律。
Thermal analysis is a class of techniques that automatically and continuously track the relationship between the physical properties and temperature of a material at programmed temperature. In particular, thermogravimetry and differential thermal analysis or differential scanning calorimetry coupled with infrared spectroscopy can be used to study organic compounds Thermal stability, phase transition and thermal decomposition mechanism. Porphyrin-derived porphyrin compounds, especially the metalloporphyrin compounds that constitute chlorophyll and heme, have drawn great attention due to their special properties, and extensively and deeply studied. In this paper, a brief introduction of the thermal analysis method is reported. The thermal decomposition mechanism and reaction kinetics of newly synthesized metalloporphyrin compounds and substituted phenyl porphyrin compounds are reported by TG and DTA. The experimental results show that different types of porphyrin compounds have different thermal stability, decomposition mechanism and decomposition activation energy due to different substituents and metal ions coordinated with the porphyrin ring, and exhibit different variation rules.