单硬脂酸甘油酯中红外光谱研究

Mid-Infrared Spectroscopy of Glyceryl Monostearate

采用中红外(MIR)光谱研究了单硬脂酸甘油酯分子的结构。实验发现:单硬脂酸甘油酯分子的红外吸收模式主要包括:ν_(asCH_(3)-单硬脂酸甘油酯)、ν_(sCH_(3)-单硬脂酸甘油酯)、ν_(asCH_(2)-单硬脂酸甘油酯)、ν_(sCH_(2)-单硬脂酸甘油酯)、ν_(C=O-单硬脂酸甘油酯)、δ_(CH_(2)-单硬脂酸甘油酯)、δ_(sCH_(3)-单硬脂酸甘油酯)和γ_(CH_(2)-单硬脂酸甘油酯)。进一步开展了单硬脂酸甘油酯分子的变温中红外(TD-MIR)光谱研究。实验发现:随着测定温度的升高(303~393 K),单硬脂酸甘油酯分子主要官能团对应的红外吸收频率及强度均有明显的改变,并进一步进行了相关机理的研究。

The glyceryl monostearate molecular structures were studied by mid-infrared(MIR)spectroscopy,including v_(asCH_(3)-glyceryl monostearate),V_(sCH_(3)-glyceryl monostearate),V_(asCH_(2)-glyceryl monostearate),V_(sCH_(2)-glyceryl monostearate),V_(C=O-glyceryl monostearate),δ_(CH_(2)-glyceryl monostearate),δ_(CH_(3)-glyceryl monostearate) and γ_(CH-glyceryl monostearate).Temperature-dependent infrared(TD-MIR)spectroscopy of glyceryl monostearate molecular was also studied in the temperature range 303~393 K.With the increase of the temperature,changes were found so obviously in the corresponding frequency and absorption intensity of glyceryl monostearate molecular that such corresponding mechanism was further discussed.