二苯甲酰甲烷的合成与热稳定性研究

目的合成二苯甲酰甲烷，对其进行结构表征及热稳定性研究。方法以苯甲酸乙酯、苯乙酮为原料合成二苯甲酰甲烷，采用核磁共振谱、电喷雾质谱、红外光谱和紫外可见光谱对化合物进行结构表征，在静态空气气氛中用热重-差示扫描量热分析法（TG—DSC）对其进行热分析研究。结果通过一系列波谱表征，确认了所得产物的结构，二苯甲酰甲烷在134～308℃时质量损失约93．21％，309～392℃时质量损失约6．61％。在249℃、365℃分别有2个放热峰。结论热分析研究结果表明二苯甲酰甲烷在固态和溶液中均很稳定。

Study on synthesis and thermoanalysis of 1,3-diphenylpropane-1,3-dione

Aim To synthesize 1,3-diphenylpropane-1,3-dione and study its molecule structure and thermal properties. Methods 1,3-diphenylpropane-1,3-dione was synthesized by ethyl benzoate and acetophenone as raw materials and its structure was characterized by ^1H NMR, ESI-MS, IR and UV-Vis spectra. The thermal properties of 1,3-diphenylpropane-1,3-dione were studied by TG-DSC methods in the static air. Results The product＇s molecule structure was characterized by a series of spectrum. From 134 ℃ to 308 ℃, a mass loss of 93.21% was observed. From 309 ℃ to 392 ℃, a mass loss of 6.61% was observed. The two peaks at 249 ℃ and 365 ℃ in DTG were observed by exothermie decomposed reaction respectively. Conclusion It was indicated that 1,3-diphenylpropane-1,3- dione is stable in solid and liquid by TG-DSC.