Removing Fermi Resonance through Deuterated Molecules with Single C-H Bond in C-H Stretching Region of Raman Spectra
The Raman spectra in the C-H stretch-ing region are of great importance for the study of the structure and dynam-ics of organic compounds.However,the Fermi resonance between the first over-tone mode of C-H bending vibration and C-H stretching vibration typically results in the disturbance of Raman bands in the C-H stretching region.In this context,a specific deuterated molecule with only one C-H bond was proposed,and it was found that the frequency of the first overtone mode of the C-H bending vibration was significantly different from the frequency of the C-H stretching vibration.Due to the significant discrepancy,Fermi resonance in the C-H stretching region was eliminated from the experimental and theoretical Raman spectra of deuterated leucine,deuterated ben-zoin,deuterated methanol,and deuterated ethanol.Hence then,the Raman spectra of these specific deuterated compounds in the C-H stretching region can be used to study the struc-ture or the dynamics of the organic compounds.
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