Obernhuber, Thorsten J. and Kensy, Uwe and Dick, Bernhard (2003) Velocity-map ion-imaging of the NO fragment from the UV-photodissociation of nitrosobenzene. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 5 (13). pp. 2799-2806. ISSN 1463-9076
Full text not available from this repository.Abstract
The velocity and angular distribution of NO fragments produced by UV photodissociation of nitrosobenzene have been determined by velocity-map ion-imaging. Excitation of the S-2-state by irradiation into the peak of the first UV absorption band at 290.5 nm leads to a completely isotropic velocity distribution with Gaussian shape. The average kinetic energy in both fragments correlates with the rotational energy of the NO fragment and increases from 6% of the excess energy for j = 6.5 to 11% for j = 29.5. A similar isotropic distribution albeit with larger average velocity is observed when the ionization laser at 226 nm is also used for photodissociation, corresponding to excitation into a higher electronic state S-n (n greater than or equal to 3) of nitrosobenzene. It is concluded that photodissociation occurs on a timescale much slower than rotation of the parent molecule, and after redistribution of the excess energy into the vibrational degrees of freedom.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TERT-BUTYL NITRITE; TRIATOMIC PHOTOFRAGMENT SPECTRA; INTERNAL ENERGY-DISTRIBUTION; COOLED METHYL NITRITE; INTENSE LASER FIELDS; ABSORPTION-SPECTRUM; DISSOCIATION DYNAMICS; ELECTRONIC-STRUCTURE; STATE DISTRIBUTIONS; PHOTO-DISSOCIATION; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry III - Physical Chemistry (Molecular Spectroscopy and Photochemistry) > Prof. Dr. Bernhard Dick |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Aug 2021 10:10 |
| Last Modified: | 26 Aug 2021 10:10 |
| URI: | https://pred.uni-regensburg.de/id/eprint/39525 |
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