Spectroscopy of the CH3O A 2A1–X 2E system by laser-excited fluorescence method
- 1 February 1980
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 72 (3) , 1769-1775
- https://doi.org/10.1063/1.439291
Abstract
Laser‐excitation spectra and single vibronic level fluorescence spectra of CH3O and CD3O A 2A1–X 2E transitions are reported. The spectral origin of the excitation spectrum is at 31 540 cm−1 (317.06 nm); extensive progressions in the stretching mode ν3′ (678 cm−1 for CH3O and 655 cm−1 for CD3O) dominate the spectra. Fluorescence bands appear that are assigned as the transition to the C–O stretching mode and CH3 deformation modes, giving ν3″=1015 cm−1 for CH3O and 1010 cm−1 for CD3O. Measured vibronic band intensities agree well with the Franck–Condon calculation. The band shape is well reconstructed on the assumption of SCF calculated geometry. No predissociation occurs below 35 900 cm−1.Keywords
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