| Title |
A unified picture of S* in carotenoids / |
| Authors |
Balevičius, Vytautas ; Abramavičius, Darius ; Polívka, Tomáš ; Pour, Arpa Galestian ; Hauer, Jürgen |
| DOI |
10.1021/acs.jpclett.6b01455 |
| Full Text |
|
| Is Part of |
Journal of physical chemistry letters.. Washington : American Chemical Society. 2016, Vol. 7, Iss. 17, p. 3347-3352.. ISSN 1948-7185 |
| Keywords [eng] |
stimulated raman-spectroscopy ; excited-state dynamics ; ground electronic-state ; beta-carotene ; transient absorption ; ultrafast dynamics ; energy-transfer ; photosynthetic antenna ; infinite polyenes ; quantum control |
| Abstract [eng] |
In pi-conjugated chain molecules such as carotenoids, coupling between electronic and vibrational degrees of freedom is of central importance. It governs both dynamic and static properties, such as the time scales of excited state relaxation as well as absorption spectra. In this work, we treat vibronic dynamics in carotenoids on four electronic states (vertical bar S-0 >, vertical bar S-1 >, vertical bar S-2 >, and vertical bar S-n >) in a physically rigorous framework. This model explains all features previously associated with the intensely debated S* state. Besides successfully fitting transient absorption data of a zeaxanthin homologue, this model also accounts for previous results from global target analysis and chain length-dependent studies. Additionally, we are able to incorporate findings from pump-deplete-probe experiments, which were incompatible to any pre-existing model. Thus, we present the first comprehensive and unified interpretation of S*-related features, explaining them by vibronic transitions on either S-1, S-0, or both, depending on the chain length of the investigated carotenoid. |
| Published |
Washington : American Chemical Society |
| Type |
Journal article |
| Language |
English |
| Publication date |
2016 |
