摘要
本文对六种新合成的8-羟甲基香豆素衍生物A、B、C、D、E和F试样进行了DSC研究,提供了这些试样在相变时的DSC热谱图和热力学参数。实验发现,化合物A和B在相变过程中呈现吸热双峰,而化合物C、D、E和F则呈现吸热单峰。这表明,化合物A和B在熔化前曾经历了一个晶形转变过程,而化合物C、D、E和F则是直接进行熔化的。同时发现,这些化合物的熔点和熔化焓与它们的分子结构具有一定的联系。
The phase transitions of six new 8-hydroxymethylcoumarin derivatives were studied by differential scanning calorimetry. Two endothermic peiks were observed on the thermograms of DSC for two of these compounds, and only one endothermic peak was observed for the others. The temperatures, enthalpies and entropies of the phase transitions of these compounds were obtained.
