ArticlePhotosynthesis research2020
Intramolecular charge-transfer state of carotenoids siphonaxanthin and siphonein: function of non-conjugated acyl-oxy group.
Article in Photosynthesis research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 13 citations in OpenAlex.
- Photoinduced chlorophyll charge transfer state identified in the light-harvesting complex II from a marine green algaiScience · 2023Article
- Electronic and Vibrational Properties of Allene Carotenoids.The journal of physical chemistry. A · 2022Article
- Structural insights into blue-green light utilization by marine green algal light harvesting complex II at 2.78 Å.BBA advances · 2022Article
- Ultrafast processes in photosynthetic light-harvesting.Photosynthesis research · 2020Article
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Authors and funding
5 authors at 3 institutions in 2 countries.
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No grant is acknowledged in the PubMed record.
Abstract
We used ultrafast transient absorption spectroscopy to study excited-state dynamics of two keto-carotenoids, siphonaxanthin and siphonein. These two carotenoids differ in the presence of dodecanoyl-oxy group in siphonein, which is attached to the C19 carbon on the same side of the molecule as the conjugated keto group. We show that this dodecanoyl-oxy group, though not in conjugation, is still capable of modifying excited state properties. While spectroscopic properties of siphonein and siphonaxanthin are nearly identical in a non-polar solvent, they become markedly different in polar solvents. In a polar solvent, siphonein, having the dodecanoyl-oxy moiety, exhibits less pronounced vibrational bands in the absorption spectrum and has significantly enhanced characteristic features of an intramolecular charge-transfer (ICT) state in transient absorption spectra compared to siphonaxanthin. The presence of the dodecanoyl-oxy moiety also alters the lifetimes of the S
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