ArticleThe journal of physical chemistry. B2016
Evaluating the Nature of So-Called S*-State Feature in Transient Absorption of Carotenoids in Light-Harvesting Complex 2 (LH2) from Purple Photosynthetic Bacteria.
Article in The journal of physical chemistry. B, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 21 citations in OpenAlex.
- Singlet fission mediates carotenoid-to-bacteriochlorophyll energy transfer in purple photosynthetic bacteria.Nature chemistry · 2026Article
- The Impact of Carotenoid Energy Levels on the Exciton Dynamics and Singlet-Triplet Annihilation in Isolated Bacterial Light-Harvesting 2 Complexes.The journal of physical chemistry. B · 2025Article
- Participation of spirilloxanthin in excitation energy transfer in reaction centers from purple bacteria Rhodospirillum rubrum.Photosynthesis research · 2025Article
- Evidence for a transfer-to-trap mechanism of fluorophore concentration quenching in lipid bilayers.Biophysical journal · 2024Article
- Cryo-EM structures of light-harvesting 2 complexes fromProceedings of the National Academy of Sciences of the United States of America · 2022Article
- Carotenoid responds to excess energy dissipation in the LH2 complex from Rhodoblastus acidophilus.Photosynthesis research · 2022Article
- Understanding Carotenoid Dynamics via the Vibronic Energy Relaxation Approach.The journal of physical chemistry. B · 2022Review
- Carotenoid-to-(bacterio)chlorophyll energy transfer in LH2 antenna complexes from Rba. sphaeroides reconstituted with non-native (bacterio)chlorophylls.Photosynthesis research · 2020Article
- A photosynthetic antenna complex foregoes unity carotenoid-to-bacteriochlorophyll energy transfer efficiency to ensure photoprotection.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- Effects of tunable excitation in carotenoids explained by the vibrational energy relaxation approach.Photosynthesis research · 2018Article
- Carotenoid-to-bacteriochlorophyll energy transfer through vibronic coupling in LH2 from Phaeosprillum molischianum.Photosynthesis research · 2018Article
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
Carotenoids are a class of natural pigments present in all phototrophic organisms, mainly in their light-harvesting proteins in which they play roles of accessory light absorbers and photoprotectors. Extensive time-resolved spectroscopic studies of these pigments have revealed unexpectedly complex photophysical properties, particularly for carotenoids in light-harvesting LH2 complexes from purple bacteria. An ambiguous, optically forbidden electronic excited state designated as S* has been postulated to be involved in carotenoid excitation relaxation and in an alternative carotenoid-to-bacteriochlorophyll energy transfer pathway, as well as being a precursor of the carotenoid triplet state. However, no definitive and satisfactory origin of the carotenoid S* state in these complexes has been established, despite a wide-ranging series of studies. Here, we resolve the ambiguous origin of the carotenoid S* state in LH2 complex from Rba. sphaeroides by showing that the S* feature can be seen as a combination of ground state absorption bleaching of the carotenoid pool converted to cations and the Stark spectrum of neighbor neutral carotenoids, induced by temporal electric field brought by the carotenoid cation-bacteriochlorophyll anion pair. These findings remove the need to assign an S* state, and thereby significantly simplify the photochemistry of carotenoids in these photosynthetic antenna complexes.
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