ArticleThe journal of physical chemistry. A2013
Explaining the temperature dependence of spirilloxanthin's S* signal by an inhomogeneous ground state model.
Article in The journal of physical chemistry. A, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Participation of spirilloxanthin in excitation energy transfer in reaction centers from purple bacteria Rhodospirillum rubrum.Photosynthesis research · 2025Article
- The nature of carotenoid S* state and its role in the nonphotochemical quenching of plants.Nature communications · 2024Article
- Understanding Carotenoid Dynamics via the Vibronic Energy Relaxation Approach.The journal of physical chemistry. B · 2022Review
- Effects of tunable excitation in carotenoids explained by the vibrational energy relaxation approach.Photosynthesis research · 2018Article
- A Unified Picture of S* in Carotenoids.The journal of physical chemistry letters · 2016Article
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Authors and funding
9 authors.
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Abstract
We investigate the nature of the S* excited state in carotenoids by performing a series of pump-probe experiments with sub-20 fs time resolution on spirilloxanthin in a polymethyl-methacrylate matrix varying the sample temperature. Following photoexcitation, we observe sub-200 fs internal conversion of the bright S2 state into the lower-lying S1 and S* states, which in turn relax to the ground state on a picosecond time scale. Upon cooling down the sample to 77 K, we observe a systematic decrease of the S*/S1 ratio. This result can be explained by assuming two thermally populated ground state isomers. The higher lying one generates the S* state, which can then be effectively frozen out by cooling. These findings are supported by quantum chemical modeling and provide strong evidence for the existence and importance of ground state isomers in the photophysics of carotenoids.
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