熊果酸的Raman光谱和红外光谱结构特征比较

Comparative Study of the Spectral Characteristics of Ursolic Acid between Laser Raman Spectra and IR Spectrum

本文采用HRD2型双光栅单色仪测定了熊果酸的Raman光谱 ,得到熊果酸的特征Raman光谱结构 ,采用Philips 10 0型双光栅单色仪测定了熊果酸的IR光谱 ,得到熊果酸的特征IR光谱结构 ;解析了熊果酸的Raman光谱和IR光谱与其结构特征的关系 ,确定了熊果酸的Raman光谱和IR光谱的结构特征和官能团的归属 ,给出了熊果酸的两个基本骨架特征区域 (A区 :1386 ,1370 ,136 3cm- 1 ,B区 :130 4 ,12 6 9,12 37cm- 1 ) ;对熊果酸的Raman光谱和IR光谱作了比较研究 ,指出Raman光谱具有比IR光谱更为丰富的结构信息的特征 ,并且 ,IR光谱的主要特征峰在Raman光谱中均有对应的谱峰 ;Raman光谱的谱峰形态清晰可变 ,使熊果酸的主要结构和官能团得到准确的分析和指认 ,与IR光谱一样 ,Raman光谱是天然药物解析的有效手段之一。

In this article, HRD2 double-beam grating monochromator was used to record the laser Raman spectra of the ursolic acid and get the Raman spectral characteristics of the ursolic acid; Philips 100 double-beam grating monochronmator was used to record the IR spectra of the ursolic acid and get the IR spectral characteristics of the ursolic acid; the relationship of the wave peaks and the structural characteristics between the Raman spectra and IR spectra was analyzed, the attribution of the functional groups in the structural characteristics of ursolic acid was basically defined, providing two basic spectra areas (area A: 1 386, 1 370, 1 363 cm(-1), and area B: 1 304, 1 269, 1237 cm(-1)), which identify the matter of ursolic acid; the comparison was made between the Raman spectra and the IR spectra, and showed that Raman spectra are much more informative in structural characteristics than the IR spectra, and the main characteristic peaks of the IR spectra can be found, which correspond to peaks in the Raman spectra; the peaks in the Raman spectra are clear and distinguishable and are used to assign the functional groups easily. In addition to IR spectra, Raman spectra are used as an effective method to analyze natural herbs.