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| Dokumentenart: | Artikel | ||||
|---|---|---|---|---|---|
| Titel eines Journals oder einer Zeitschrift: | Physical Chemistry Chemical Physics | ||||
| Band: | 3 | ||||
| Nummer des Zeitschriftenheftes oder des Kapitels: | 14 | ||||
| Seitenbereich: | S. 2819-2830 | ||||
| Datum: | 2001 | ||||
| Zusätzliche Informationen (Öffentlich): | CAN 135:264400 74-1 Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes 2396-01-2 (Phenyl radical) Role: FMU (Formation, unclassified), PEP (Physical, engineering or chemical process), FORM (Formation, nonpreparative), PROC (Process) (photofragment; UV-photodissocn. of jet-cooled nitrosobenzene studied by fluorescence excitation spectroscopy of NO fragment); 10102-43-9 (Nitrogen oxide(NO) Role: FMU (Formation, unclassified), PEP (Physical, engineering or chemical process), PRP (Properties), FORM (Formation, nonpreparative), PROC (Process) (rotational and vibrational states of NO fragment in photolysis of jet-cooled nitrosobenzene studied by fluorescence excitation spectroscopy); 586-96-9 (Nitrosobenzene) Role: PEP (Physical, engineering or chemical process), RCT (Reactant), PROC (Process), RACT (Reactant or reagent) (rotational and vibrational states of NO fragment in photolysis of jet-cooled nitrosobenzene studied by fluorescence excitation spectroscopy) | ||||
| Institutionen: | Chemie und Pharmazie > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry III - Physical Chemistry (Molecular Spectroscopy and Photochemistry) > Prof. Dr. Bernhard Dick Chemie und Pharmazie > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry III - Physical Chemistry (Molecular Spectroscopy and Photochemistry) > Prof Dr. Alkwin Slenczka | ||||
| Identifikationsnummer: |
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| Stichwörter / Keywords: | Electronic state; Translational energy (UV-photodissocn. of jet-cooled nitrosobenzene studied by fluorescence excitation spectroscopy of NO fragment); Photolysis (dynamics, rotational and vibrational states of NO fragment in photolysis of jet-cooled nitrosobenzene studied by fluorescence excitation spectroscopy); Rotational energy; Singlet state excitation; Vibrational energy (rotational and vibrational states of NO fragment in photolysis of jet-cooled nitrosobenzene studied by fluorescence excitation spectroscopy); photodissocn nitrosobenzene fluorescence excitation spectroscopy nitrogen oxide photofragment; photolysis dynamics nitrosobenzene photofragment isotropic velocity distribution | ||||
| Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 540 Chemie | ||||
| Status: | Veröffentlicht | ||||
| Begutachtet: | Ja, diese Version wurde begutachtet | ||||
| An der Universität Regensburg entstanden: | Ja | ||||
| Dokumenten-ID: | 5559 |
Zusammenfassung
Monomeric nitrosobenzene was cooled in a supersonic jet and photolyzed with a tunable laser by excitation into the first and second UV absorption bands corresponding to the second and higher excited singlet states (Sn, n>=2). The populations of the rotational and vibrational states of the NO fragment were probed by fluorescence excitation spectroscopy with a second laser. No alignment of the ...
Zusammenfassung
Monomeric nitrosobenzene was cooled in a supersonic jet and photolyzed with a tunable laser by excitation into the first and second UV absorption bands corresponding to the second and higher excited singlet states (Sn, n>=2). The populations of the rotational and vibrational states of the NO fragment were probed by fluorescence excitation spectroscopy with a second laser. No alignment of the photofragment could be obsd., and the Doppler profiles indicate an isotropic velocity distribution. It is concluded that the dissocn. occurs after fast internal conversion to the potential energy surfaces of the electronic states S0 or S1 which correlate both with the electronic ground states of the products. A strong preference for the A'' component of the L-doublets is obsd. If orbital symmetry is conserved, the plane of rotation of the NO fragment is perpendicular to the plane of the Ph radical, i.e. dissocn. occurs from a highly excited torsional state in a propeller-like motion.
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