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对空气／甲醇液体界面的和频振动光谱进行了定量的理论分析．虽然甲醇的红外和Raman光谱中都具有明显的反对称伸缩振动峰,但该光谱峰在界面和频振动光谱中却从未被观测到．利用已知的甲醇液体的红外和Raman光谱对和频振动光谱的键极化模型进行了修正,从而对此实验现象进行了定量的解释．此修正可以广泛地应用于界面和频振动光谱的研究中．
A quantitative theoretical analysis of the sum frequency vibration spectra of the air / methanol liquid interface was carried out. Although both the infrared and Raman spectra of methanol show significant anti-symmetric stretching vibrational peaks, this peak has never been observed in the interface and frequency vibrational spectra. The key polarization model of the harmonic vibration spectrum was modified by using the known methanol liquid infrared and Raman spectroscopy, and the experimental phenomenon was quantitatively explained. This correction can be widely used in the study of interface and frequency vibrational spectroscopy.