Electron−Vibrational Coupling in the Fenna−Matthews−Olson Complex of Prosthecochloris aestuarii Determined by Temperature-Dependent Absorption and Fluorescence Line-Narrowing Measurements
Year: 2000
Type: article
Abstract: 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, 70, and ∼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.
DOI: 10.1021/jp000077+
Institutions: Leiden University, Lund University, Vrije Universiteit Amsterdam
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1971052325