Long-lived coherent oscillations of the femtosecond transients in cyanobacterial photosystem I

文献情報

出版日 2006-11-13

DOI 10.1039/B605660A

インパクトファクター 3.676

著者

Oleg M. Sarkisov, Fedor E. Gostev, Vladimir I. Novoderezhkin, Oxana A. Gopta, Mahir D. Mamedov, Alexey Yu. Semenov

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要旨

The pulsed excitation of electronic levels coupled to specific nuclear modes by a 26 fs laser pulse at 706 nm creates a wavepacket in the nuclear space of photopystem I (PS I) of Synechocystis sp. strain PCC 6803 both in the ground state and in the one-exciton manifold. Fourier transform of transient decay curves shows several low frequency peaks. The most prominent Power Spectral Density (PSD) peaks are at ω = 49 cm−1 and ω = 88 cm−1. The peculiarity of the coherent wavepacket in the PS I of S. sp. strain PCC 6803 is the unique, long-lived 49 cm−1 and 88 cm−1 oscillations with decay times up to 10 ps. It was suggested that such a long-lived coherence is determined by a contribution of the ground state wavepacket. The dependence of these two PSD peaks on the probe wavelength resembles the profile of the transient absorption spectra of PS I. The pump–probe signal in the Soret region reflects the dynamics of the ground state wavepacket created by pulsed excitation of the Qy-band. It was shown that the multimode Brownian oscillator model allows a quantitative fit of the oscillatory patterns of the pump–probe signal to be obtained.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

Long-lived coherent oscillations of the femtosecond transients in cyanobacterial photosystem I

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