Ultrafast excitation relaxation dynamics and energy transfer in the siphonaxanthin-containing green alga Codium fragile

被引：27

作者：

Akimoto, S ^{[1
]}

Yamazaki, I

Murakami, A

Takaichi, S

Mimuro, M

机构：

[1] Hokkaido Univ, Grad Sch Engn, Dept Mol Chem, Sapporo, Hokkaido 0608628, Japan

[2] Kobe Univ, Res Ctr Inland Seas, Awaji 6562401, Japan

[3] Kobe Univ, Grad Sch Sci & Technol, Kobe, Hyogo 6578501, Japan

[4] Nippon Med Coll, Biol Lab, Kawasaki, Kanagawa 2110063, Japan

[5] Kyoto Univ, Dept Technol & Ecol, Kyoto 6068501, Japan

[6] Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 390卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2004.03.140

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ultrafast excitation relaxation dynamics and energy transfer processes in the siphonaxanthin (Siph)-containing green alga, Codium fragile, were examined using femtosecond time-resolved fluorescence spectroscopy. Fluorescence anisotropy decay and fluorescence lifetimes clearly indicated that an efficient Siph-to-chlorophyll (Chl) a energy transfer was achieved via the S, state of Siph with a time constant of 400 fs. Energy migration times among Chl molecules were also resolved. Siph in the chloroplasts exhibited a new absorption band at approximately 535 nm, and we proposed that this originated from a new excited state (S-x) between the S-2 and S-1 states based on fluorescence anisotropy decay. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：45 / 49

页数：5

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