卟啉化合物的热化学研究——Ⅵ. 四苯基卟啉化合物的标准燃烧能和生成焓

用中国计量科学院提供的量热基准苯甲酸标定了本实验室建立的精密静弹燃烧热量计,测定了四邻甲氧基苯基卟啉(T_(o—OCH_3)PP)和四对二甲氨基苯基卟啉(T_(p—N(CH_3)_2)PP)的标准燃烧能,并计算出标准生成焓。实验仪器等温环境潜水式静弹燃烧热量计,量热环境主要包括恒温水槽和量热筒外套两部分,水槽中的两个泵式搅拌器能使水槽中的水充分搅动。量热体系包括量热筒、筒内定量的水、氧弹、内加热器、内搅拌器、热敏电阻测温探头以及一支辅助检测温度计。量热

STUDIES ON THERMOCHEMISTRY OF PORPHYRINS Ⅵ, The Standard Energies of Combustion and Standard Enthalpies of Formation of Tetramethoxyphenylporphyrin and Tetradimethylaminophenylporphyrin

Using a precision static oxygen-bomb calorimeter, the standard energies of combustion at 298.15 K of tetra-(o-methoxyphenyl)porphyrin and tetra-(p-dimethylaminophenyl) porphyrin were determined to be-32. 7967±0.0122 kJ g~(-1), -34.5011±0.0115 kJ g~(-1) respectively, the corresponding standard enthalpies of formation at 298.15K were calculated to be -205.8±9.0 kJ mol~(-1), -434.8±9.1 kJ mol~(-1).