一维中红外光谱间苯二酚热稳定性

采用一维中红外(MIR)光谱技术开展了间苯二酚的结构研究。间苯二酚的红外吸收模式包括:νOH-间苯二酚、νCH-间苯二酚、νC=C-间苯二酚、βOH-间苯二酚、νC-O-间苯二酚、βCH-间苯二酚、γCH-间苯二酚和δ环-间苯二酚。采用一维变温中红外(TD-MIR)光谱,进一步开展了间苯二酚的热稳定性研究。实验发现:在293~453 K的温度范围内,随着测定温度的升高,间苯二酚的主要官能团对应的吸收频率及强度均有明显的改变,间苯二酚的热稳定性进一步降低,而383~393 K是一个临界温度区间,并进一步进行了机理研究。研究进一步证明一维MIR光谱和一维TD-MIR光谱在重要的精细化工中间体(间苯二酚)结构及热稳定性分析中的重大作用。

One-dimensional infrared study of resorcinol thermal stability

The resorcinol molecular structure had been studied onedimensional by infrared(MIR)spectroscopy.There wereνOH-resorcinol,νCH-resorcinol,νC=C-resorcinol,βOH-resorcinol,νC-O-resorcinol,βCH-resorcinol,γCH-resorcinol andδring-resorcinol.One-dimensional temperature-dependent infrared(TDMIR)spectroscopy of resorcinol were studied also in the temperature range293-453 K.With the increase of the temperature,the corresponding frequency and absorption intensity of resorcinol had changed obviously and the thermal stability decreased.The 383-393 K was a critical temperature range and the mechanism was studied also.The paper demonstrated the key roles of one-dimensional MIR spectroscopy and one-dimensional TD-MIR spectroscopy in the analysis of structure and thermal stability of the important fine chemical intermediates(resorcinol).