安息香酸ν_(CO)二维相关红外光谱研究

Two-Dimensional Correlation Infrared Spectroscopy of Benzoic Acid Expansion and Contraction Vibration Mode ν_(C=O)

采用傅里叶透射红外光谱技术研究了安息香酸CO伸缩振动模式(ν_(CO))的一维红外光谱、二阶导数红外光谱及二维相关红外光谱。实验发现安息香酸ν_(CO)存在1 678 cm^(-1)(ν_(CO-1))、1 690 cm^(-1)(ν_(CO-2))和1 703 cm^(-1)(ν_(CO-3))等3个红外吸收频率。采用二维相关红外光谱技术进一步了研究温度变化对于安息香酸分子结构的影响。

One-dimensional infrared spectra, second-derivative infrared spectra and two-dimensional correlation infrared spectra of benzoic acid C = O expansion and contraction vibration mode （uc=o） were studied via Fourier transmission infrared spectroscopy. It was found in the experiment that three IR absorption frequencies, i.e. 1 678 cm-1 （vc =0-1）,1690 cm -1 （ Vc =0-2 ） and 1 703 cm-1 （Vc =0-3 ）, exist in benzoic acid expansion and contraction vibration mode vc =0. The effect of temperature change on the molecular structure of benzoic acid was further studied via two-dimensional correlation infrared spectroscopy.