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EnglishWe have studied the effect of transient vibrational inversion of population in trans-β-apo-8 -carotenal on the time-resolved femtosecond stimulated Raman scattering (TR-FSRS) signal. The experimental data are interpreted by applying a quantum mechanical approach, using the formalism of projection operators for constructing the theoretical model of TR-FSRS. Within this theoretical frame we explain the presence of transient Raman losses on the Stokes side of the TR-FSRS spectrum as the effect of vibrational inversion of population. In view of the obtained experimental and theoretical results, we conclude that the excited S2 electronic level of trans-β-apo-8 -carotenal relaxes towards the S0 ground state through a set of four vibrational sublevels of S1 state.
| Titolo: | Dynamics of the time-resolved stimulated Raman scattering spectrum in presence of transient vibronic inversion of population on the example of optically excited trans-β-apo-8′-carotenal |
| Autori: | |
| Data di pubblicazione: | 2014 |
| Rivista: | |
| Abstract: | We have studied the effect of transient vibrational inversion of population in trans-β-apo-8 -carotenal on the time-resolved femtosecond stimulated Raman scattering (TR-FSRS) signal. The experimental data are interpreted by applying a quantum mechanical approach, using the formalism of projection operators for constructing the theoretical model of TR-FSRS. Within this theoretical frame we explain the presence of transient Raman losses on the Stokes side of the TR-FSRS spectrum as the effect of vibrational inversion of population. In view of the obtained experimental and theoretical results, we conclude that the excited S2 electronic level of trans-β-apo-8 -carotenal relaxes towards the S0 ground state through a set of four vibrational sublevels of S1 state. |
| Handle: | http://hdl.handle.net/11696/58671 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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| J. Chem. Phys. 140, 204312 (2014).pdf | Versione editoriale | Utenti riconosciuti Richiedi una copia |
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