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Ultrafast dynamics in polycyclic aromatic hydrocarbons: the key case of conical intersections at higher excited states and their role in the photophysics of phenanthrene monomer.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Nazari, M. Bösch, Caroline D. Rondi, A. Francés-Monerris, Antonio Marazzi, Marco Lognon, E. Gazzetto, Michela Langenegger, Simon Matthias Häner, Robert Feurer, Thomas Monari, Antonio Cannizzo, Andrea |
| Copyright Year | 2019 |
| Abstract | In this study we reveal the detailed photocycle of a phenanthrene monomer. Phenanthrene serves as a popular building block for supramolecular systems and as an archetypal molecule to study the photochemistry of polycyclic aromatic hydrocarbons. By means of femtosecond time-resolved UV-vis transient absorption spectroscopy and molecular modeling, we found that the first bright transition involves the second excited singlet state, which relaxes toward the lowest excited singlet state with a biphasic internal conversion through a conical intersection region: a fast coherent branching followed by an exceptionally slow (∼ps) incoherent internal conversion. We succeeded to pinpoint the complete relaxation pathways and to extract the relevant parameters, e.g., the branching ratio at the conical intersection and internal conversion rates. |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c9cp03147b |
| PubMed reference number | 31342018 |
| Journal | Medline |
| Alternate Webpage(s) | https://boris.unibe.ch/141004/1/2019%20PCCP%20Phenanthrene%20Conical%20Intersection.pdf |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2019/cp/c9cp03147b |
| Alternate Webpage(s) | https://doi.org/10.1039/c9cp03147b |
| Journal | Physical chemistry chemical physics : PCCP |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
