title: Syntheses of allene-modified derivatives of peridinin toward elucidation of the effective role of the allene function in high energy transfer efficiencies in photosynthesis.
abstract: Peridinin is known as the main light-harvesting pigment in photosynthesis in the sea and exhibits exceptionally high energy transfer efficiencies to chlorophyll a. This energy transfer efficiency is thought to be related to the intricate structure of peridinin, which possesses allene and ylidenbutenolide functions in the polyene backbone. There are, however, no studies on the relationship between the structural features of peridinin and its super ability for energy transfer. We then focused on the subjects of why peridinin possesses a unique allene group and how the allene function plays a role in the exceptionally high energy transfer. Toward elucidation of the exact role of the allene function, we now describe the syntheses of three relatively unstable allene-modified derivatives of peridinin along with the results of the Stark spectroscopy of peridinin and the synthesized peridinin derivatives.
authors.affiliation: Department of Chemistry and Open Research Center on Organic Tool Molecules, School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Kajikawa
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Aoki
authors.forename: Ram Shanker
authors.initials: RS
authors.lastname: Singh
authors.forename: Takashi
authors.initials: T
authors.lastname: Iwashita
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Kusumoto
authors.forename: Harry A
authors.initials: HA
authors.lastname: Frank
authors.forename: Hideki
authors.initials: H
authors.lastname: Hashimoto
authors.forename: Shigeo
authors.initials: S
authors.lastname: Katsumura
mesh_terms: D000114:Acetylene / Q000737:chemistry; D000466:Alkadienes / Q000737:chemistry* / Q000378:metabolism*; D000475:Alkenes / Q000737:chemistry; D002338:Carotenoids / Q000138:chemical synthesis* / Q000737:chemistry / Q000378:metabolism; D002734:Chlorophyll / Q000737:chemistry / Q000378:metabolism; D000077194:Chlorophyll A; D004735:Energy Transfer; D008958:Models, Molecular; D010788:Photosynthesis; D011487:Protein Conformation; D012997:Solvents / Q000737:chemistry; D013057:Spectrum Analysis
chemical_list: D000466:Alkadienes; D000475:Alkenes; D012997:Solvents; D002734:Chlorophyll; C016040:peridinin; D002338:Carotenoids; C025947:propadiene; D000114:Acetylene; D000077194:Chlorophyll A
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