Study on the infrared absorption spectra of CH₃O molecules

In order to Study on the infrared absorption spectra of CH₃O molecules. Using Nd: YAG laser as light source, CH₃O is produced by CH₃ONO photo-degradation in p-H₂ matrix and its infrared absorption spectra are studied by matrix isolation method and infrared spectrometer. The experimental results show that the infrared absorption spectral lines located at 689.3/694.6 cm^-1, 945.9/951.7 cm^-1, 1041.8 cm^-1, 1224.7 cm^-1, 1235.5 cm^-1, 1347.7 cm^-1, 1365.4 cm^-1, 1522.3 cm^-1 are observed and their vibration modes are analyzed. The corresponding vibration modes are, respectively, symmetric ν₆ of electronic state E_1/2a₁, symmetric ν₆ of electronic state E_1/2a₂, symmetric ν₂ of electronic state E_2/3, symmetric ν₆ of electronic state E_2/3e, symmetric ν₆ of electronic state E_1/2e, symmetric ν₅ of electronic state E_1/2a₁, symmetric ν₂ of electronic state E_3/2, symmetric ν₂ of electronic state E_1/2 and symmetric ν₅ of electronic state E_1/2e. (authors)