Ultrafast absorption spectroscopy of photodissociated CF2Br2: Details of the reaction mechanism and evidence for anomalously slow intramolecular vibrational redistribution within the CF2Br intermediate
Gosnell, T. R. ; Taylor, A. J. ; Lyman, J. L.
College Park, Md. : American Institute of Physics (AIP)
Published 1991
College Park, Md. : American Institute of Physics (AIP)
Published 1991
| ISSN: |
1089-7690
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| Source: |
AIP Digital Archive
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| Topics: |
Physics
Chemistry and Pharmacology
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| Notes: |
Ultrafast time-resolved absorption spectroscopy in the hard ultraviolet has been used to investigate the photodissociation of gas-phase CF2Br2 photolyzed at 248 nm. The broadband spectra obtained in the 250–265 nm region have shown that absorption of a single photon activates a two-step sequential elimination of the molecule's two bromine atoms, leaving the product CF2 radical in the ground or first-excited vibrational state of its ν2 bending mode. The spectra also demonstrate the direct detection of the vibrationally hot CF2Br intermediate species itself. We interpret the ∼6 ps time scale over which the diffuse CF2Br spectrum evolves as evidence for slow intramolecular vibrational redistribution within this molecule.
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| Type of Medium: |
Electronic Resource
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| URL: |