Ultrafast exciton relaxation in the B850 antenna complex of Rhodobacter sphaeroides

被引：92

作者：

Nagarajan, V ^{[1
]}

Alden, RG ^{[1
]}

Williams, JC ^{[1
]}

Parson, WW ^{[1
]}

机构：

[1] ARIZONA STATE UNIV, DEPT CHEM & BIOCHEM, TEMPE, AZ 85287 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 1996年 / 93卷 / 24期

关键词：

D O I：

10.1073/pnas.93.24.13774

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：

Spectral changes were measured with femtosecond resolution following low-intensity, broad-band excitation of the peripheral antenna complex of the purple photosynthetic bacterium Rhodobacter sphaeroides. Absorption anisotropy decays also were measured, We identified a 35-fs relaxation of the absorption and emission spectra of the excited state, as well as a 20-fs anisotropy decay. We interpret these results as interlevel relaxation and dephasing, respectively, of extensively delocalized exciton states of the circular bacteriochlorophyll aggregate.

引用

页码：13774 / 13779

页数：6

共 22 条

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