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由于C—F键的强极性,其振动模式在红外光谱中表现为强吸收谱带,而在拉曼光谱中则较弱,因此早期关于有机氟化合物振动光谱的研究以红外光谱为多,这方面Brown和Morgan已有详细总结.但有机氟化物的某些骨架振动往往呈现强的拉曼谱带.近年来对环状有机物的拉曼光谱研究已有较全面的总结,但对全氟环烷类及其衍生物尚无较系统的研究.本文报道若干全氟环烃及其衍生物的拉曼光谱数据,讨论了环呼吸振动频率与环大小及取代基的关系,环内双键振动频率的特性.实验证明全氟环烃的某些光谱特征与碳氢的环烃有较大的差异.
Due to the strong polarity of the C-F bond, the vibrational mode shows strong absorption band in the infrared spectrum and weaker in the Raman spectrum. Therefore, the earlier studies on the vibrational spectra of organofluorine compounds mainly include the infrared spectrum, Brown and Morgan in this regard have been summarized in detail, but some of the framework of organic fluoride vibration often exhibits strong Raman bands Raman spectroscopy ring organic has been more fully summarized in recent years, but the perfluoro Naphthalene and its derivatives have not been systematically studied.In this paper, the Raman spectra of several perfluorocyclic hydrocarbons and their derivatives were reported, the relationship between ring breathing vibration frequency and ring size and substituents was discussed, Vibration frequency characteristics of the experimental results show that some of the spectral characteristics of perfluorinated cyclic hydrocarbons and hydrocarbon hydrocarbons are quite different.