Electron-vibrational coupling in the Fenna-Matthews-Olson complex of Prosthecochloris aestuarii determined by temperature-dependent absorption and fluorescence line-narrowing measurements

被引:158
作者
Wendling, M
Pullerits, T
Przyjalgowski, MA
Vulto, SIE
Aartsma, TJ
van Grondelle, R
van Amerongen, H
机构
[1] Vrije Univ Amsterdam, Fac Sci, Div Phys & Astron, Dept Biophys & Phys Complex Syst, NL-1081 HV Amsterdam, Netherlands
[2] Univ Lund, Dept Phys Chem, S-22100 Lund, Sweden
[3] Rijksuniv Leiden, Dept Biophys, Huygens Lab, NL-2300 RA Leiden, Netherlands
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 24期
关键词
D O I
10.1021/jp000077+
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
Fluorescence line-narrowing measurements at low temperature were performed on the Fenna-Matthews-Olson complex of Prosthecochloris aestuarii. Superimposed on the phonon wing, several vibronic bands could be observed. By use of these data, the temperature dependence of the lowest-energy absorption band was modeled based on the linear harmonic Franck-Condon approximation. The overall Huang-Rhys factor was estimated to be 0.45. The maximum of the phonon distribution was located at 20 cm(-1). Thirty vibrational modes could be observed, and their Franck-Condon factors were estimated. The strongest modes were located at 36, 701 and similar to 195 cm(-1). For the full width at half-maximum of the inhomogeneous broadening, a value of 80 cm(-1) was determined. We did not find any evidence for the presence of different excitonic states in the lowest-energy absorption band.
引用
收藏
页码:5825 / 5831
页数:7
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