Study of the Raman spectrum of CCl4 Fermi resonance

Fermi resonance is a very common phenomenon in molecule vibration spectra, especially in polyatomic molecule with complex structure. Fermi resonance appears when a fundamental vibration frequency lies closely to an overtone or combination frequencies. One can observe two peaks coming from Fermi reso...

Full description

Saved in:
Bibliographic Details
Published inGuang pu xue yu guang pu fen xi Vol. 27; no. 10; p. 2042
Main Authors Gao, Shu-qin, He, Jia-ning, Li, Rong-fu, Zuo, Jian, Li, Zhao-kai, Cao, Biao, Li, Zuo-wei
Format Journal Article
LanguageChinese
Published China 01.10.2007
Online AccessGet more information

Cover

More Information
Summary:Fermi resonance is a very common phenomenon in molecule vibration spectra, especially in polyatomic molecule with complex structure. Fermi resonance appears when a fundamental vibration frequency lies closely to an overtone or combination frequencies. One can observe two peaks coming from Fermi resonance and the energy transfer also occurs between the two peaks. Fermi resonance phenomenon appears in both infrared spectrum and Raman spectrum. The Raman spectrum of CCl4 was measured. The frequency separation between the two peaks in a Fermi resonance doublet was observed and the integrated intensities were calculated with the software of Origin Pro 7.5. Fermi resonance interaction was caused by the CCl4 C-Cl f-symmetrical stretching fundamental nu3 coupling. The combination frequency (nu1 + nu4) of C-Cl a1-symmetrical stretching nu1 and band C-Cl2 f-symmetrical bending nu4 was calculated. Based on Bertran's theory, Fermi coupling coefficient W was calculated and the theoretical value nu3(0) of nu3 was estimated
ISSN:1000-0593