| Project/Area Number |
25410183
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Bio-related chemistry
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| Research Institution | Osaka City University |
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Principal Investigator |
Katsumura Shigeo 大阪市立大学, 大学院理学研究科, 客員教授 (70047364)
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| Co-Investigator(Kenkyū-buntansha) |
SAKAGUCHI KAZUHIKO 大阪市立大学, 大学院理学研究科, 准教授 (80264795)
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| Co-Investigator(Renkei-kenkyūsha) |
HASHIMOTO HIDEKI 大阪市立大学, 複合先端研究機構, 教授 (50222211)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 海洋光合成初期過程 / カルボニルカロテノイド / ペリジニン / フコキサンチン / デオキシペリジニン類縁体合成 / 構造的特徴と機能の関係 / 超効率的エネルギー伝達機構解明 / 海洋光合成 / ICT (分子内電荷移動) 準位 / デオキシペリジニン / Pd触媒による３種のカップリング / 立体化学を制御した合成 / 超分子 (PCP) 複合体再構成の試み / 光合成初期過程 / イリデンブテノリド / ICT準位 / 超分子複合体再構成 / 超効率的エネルギー伝達機構 / カロテノイド・ペリジニン / カロテノイド・フコキサンチン / アレン結合 / ３成分連結ワンポットカップリング / アルキニルビニルスズエステル |
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| Outline of Final Research Achievements |
Peridinin and fucoxanthin are auxiliary light harvesting pigments in the sea. In the super complexes constructed with these carotenoids, chlorophyll and apoprotain, high (>85%) energy transfer efficiencies from them to chlorophyll were reported. Previously, we substantiated the existence of intramolecular charge transfer state (ICT) by ultrafast time resolved spectra measurements (UTRSM) of the synthesized π-conjugation modified analogues. In this project, we have elucidated that ylidenbutenolide of peridinin is essential for ICT generation and allene of fucoxanthin contributes ICT stabilization, by UTRSM of β-caroten ylidenbutenolide derivatives and also C32 fucoxanthin olefin-derivatives. Intending to reconstitute the corresponding super complex, we have synthesized peridinin decarbonyl analogue by the sequential sp and sp2 couplings from E-β-ethynyl-α-stannyl acrylate, obtained by novel anti-selective ethynylstannylation of propiolate. Reconstitution has not been successful yet.
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