Microscopic theory of exciton annihilation:: Application to the LH2 antenna system

被引：66

作者：

Brüggemann, B

Herek, JL

Sundstrom, V

Pullerits, T

May, V

机构：

[1] Humboldt Univ, Inst Phys, D-10117 Berlin, Germany

[2] Lund Univ, Ctr Chem, Dept Phys Chem, S-22100 Lund, Sweden

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2001年 / 105卷 / 46期

关键词：

D O I：

10.1021/jp012072y

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：

The multiexciton density matrix theory is utilized to achieve a microscopic description of exciton-exciton annihilation (EEA). We apply the theory to the 18 bacteriochlorophyll (BChl) molecules of the B850 ring of the light-harvesting complex LH2 of Rhodobacter sphaeroides. The simulation of the EEA process reproduces the intensity-dependent transient absorption kinetic experiments very well, and insight is obtained on microscopic parameters such as the internal conversion rate of BChl in LH2. The exciton dynamics and the different relaxation processes are visualized by constructing a multiexciton spectrogram.

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页码：11391 / 11394

页数：4

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