| Autor: |
Sioutis, Ilias, Stakhursky, Vadim L., Tarczay, György, Miller, Terry A. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 2/28/2008, Vol. 128 Issue 8, p084311, 18p, 2 Diagrams, 8 Charts, 9 Graphs |
| Abstrakt: |
Laser-induced fluorescence (LIF) and laser-excited dispersed fluorescence (LEDF) spectra of the cycloheptatrienyl (tropyl) radical C7H7 have been observed under supersonic jet-cooling conditions. Assignment of the LIF excitation spectrum yields detailed information about the Ã-state vibronic structure. The LEDF emission was collected by pumping different vibronic bands of the à 2E3″←X 2E2″ electronic spectrum. Analysis of the LEDF spectra yields valuable information about the vibronic levels of the X 2E2″ state. The X- and Ã-state vibronic structures characterize the Jahn-Teller distortion of the respective potential energy surfaces. A thorough analysis reveals observable Jahn-Teller activity in three of the four e3′ modes for the X 2E2″ state and two of the three e1′ modes for the à 2E3″ state and provides values for their deperturbed vibrational frequencies as well as linear Jahn-Teller coupling constants. The molecular parameters characterizing the Jahn-Teller interaction in the X and à states of C7H7 are compared to theoretical results and to those previously obtained for C5H5 and C6H6+. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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