Photosynthetic light harvesting by carotenoids: Detection of an intermediate excited state

被引：235

作者：

Cerullo, G

Polli, D

Lanzani, G

De Silvestri, S

Hashimoto, H

Cogdell, RJ

机构：

[1] Politecn Milan, Dipartimento Fis, Natl Lab Ultrafast & Ultraintense Opt Sci, INFM, I-20133 Milan, Italy

[2] Univ Glasgow, Div Biochem & Mol Biol, Glasgow, Lanark, Scotland

来源：

SCIENCE | 2002年 / 298卷 / 5602期

关键词：

D O I：

10.1126/science.1074685

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We present the first direct evidence of the presence of an intermediate singlet excited state (S-x) mediating the internal conversion from S-2 to S-1 in carotenoids. The S-2 to S-x transition is extremely fast and is completed within approximately 50 femtoseconds. These results require a reassessment of the energy transfer pathways from carotenoids to chlorophylls in the primary step of photosynthesis.

引用

收藏

页码：2395 / 2398

页数：5

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