Single Vibronic Level Photochemistry of Formaldehyde (H2CO singlet A2): I. Radiative and Non-Radiative Transitions.
Final rept. 1 Apr 74-31 Mar 75,
CALIFORNIA UNIV IRVINE DEPT OF CHEMISTRY
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Fluorescence decay times and fluorescence emission quantum yields from various single vibronic levels of the first excited singlet state of H2CO singlet A2 have been measured. Radiative and non-radiative lifetimes of the single vibronic levels have been determined. The stronger promoting vibrational mode for the radiative transition is the asymmetric stretch mode rather than the out-of-plane bending mode. The latter mode, however, is a promoting mode for the non-radiative transition. As much as a factor of 40 variation in the radiative lifetime values is observed for the variety of vibrational states studied.
- Atomic and Molecular Physics and Spectroscopy