Characterization of ν3 Vibrational Levels in S0 Formyl Fluoride Using Dispersed Fluorescence Spectroscopy
✍ Scribed by Karen E. Hahn; Katie M. Horsman; William F. Polik
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 180 KB
- Volume
- 210
- Category
- Article
- ISSN
- 0022-2852
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✦ Synopsis
The harmonic frequency and anharmonic constants of the CH bend (ν 3 ) of formyl fluoride (HFCO) have been determined using the technique of dispersed fluorescence spectroscopy. Sample molecules were cooled in a supersonic expansion and excited to low J , K a = 0 rotational states in the 3 1 vibrational level of S 1 HFCO. The resulting fluorescence to the ground electronic state was dispersed and a 23 000 cm -1 pure vibrational spectrum was recorded. A total of 142 new vibrational assignments were made, which extends the total number of vibrational assignments for S 0 HFCO to 382. Of these assignments, 109 involve ν 3 with v 3 = 1-2. The data were analyzed using a multiresonant Hamiltonian model, which accounts for resonant interactions among nearly degenerate states, with a standard deviation of 4.5 cm -1 .