A disordered polaron model for polarized fluorescence excitation spectra of LH1 and LH2 bacteriochlorophyll antenna aggregates

被引：25

作者：

Trinkunas, G

Freiberg, A

机构：

[1] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia

[2] Inst Phys, LT-02300 Vilnius, Lithuania

[3] Univ Tartu, Inst Mol & Cell Biol, EE-51010 Tartu, Estonia

来源：

JOURNAL OF LUMINESCENCE | 2006年 / 119卷

关键词：

photosynthetic antenna aggregates; excitons; polarons; diagonal disorder; off-diagonal disorder; fluorescence polarization;

D O I：

10.1016/j.jlumin.2005.12.060

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Excitonic polarons in antenna complexes are subject to static lattice disorder. A model has been developed to analyze polarized fluorescence excitation spectra of circular light-harvesting complexes from purple photosynthetic bacteria containing bacteriochlorophyll as the main photoactive pigment that includes both diagonal (energetic) and off-diagonal (structural) disorders. Essential differences of disorder realizations seem to exist between the core LH1 and peripheral LH2 complexes from the bacterium Rhodobacter sphaeroides. The disorder in LH1 appears to be dominated by the structural disorder, while that in LH2, by energetic one. These differences may be due to relatively bigger size of the LH1 complex and, consequently, with its enhanced structural flexibility. (c) 2006 Elsevier B.V. All rights reserved.

引用

收藏

页码：105 / 110

页数：6

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