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采用傅里叶透射红外光谱技术研究了安息香酸CO伸缩振动模式(ν_(CO))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_(CO)存在1 678 cm~(-1)(ν_(CO-1))、1 690 cm~(-1)(ν_(CO-2))和1 703 cm~(-1)(ν_(CO-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。
The Fourier transform infrared spectroscopy (FT-IR) was used to study the one-dimensional infrared spectra, second-order derivative infrared spectra and two-dimensional correlation infrared spectra of CO stretching vibration mode (ν_ (CO)). The results showed that there were 1 678 cm -1 (ν_ (CO-1)), 1 690 cm -1 (ν_ (CO-2)) and 1 703 cm -1 (ν_ (CO-3)) and other three infrared absorption frequencies. Two-dimensional correlation infrared spectroscopy was used to further study the effect of temperature on the molecular structure of benzoic acid.