Exciton modeling of energy-transfer dynamics in the LHCII complex of higher plants: A Redfield theory approach

Article Abstract:

An exciton model is proposed for the peripheral plant light-harvesting complex LHCII that allows us to explain the absorption (OD) and linear dichroism (LD) spectra, the superdiance (SR), the pump-probe transient adsorption (TA), the three-pulse photon echo peak shift (3PEPS), and transient grating (TG) kinetics at different excitation wavelengths. The spectral density of the exciton-phonon coupling adjusted from the fit allowed to determine the time scales and pathways of energy transfer in LHCII.

Photons, Energy transfer, Coordination compounds

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Electronic and vibrational coherence in the core light-harvesting antenna of Rhodopseudomonas viridis

Article Abstract:

The wavelength-dependent oscillatory features in the pump-probe kinetics of the core LH1 antenna of Rhodopseudomonas (Rps) virdis are explained. The specific property of Rps.virdis is the cause for the strong oscillations in the pump-probe kinetics and for the pronounced heterogeneity of the absorption band due to combined effect of the exciton splitting and vibrational side-bands.

Pseudomonas, Photosynthesis, Oscillation, Oscillations

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Exciton (De) localization in the LH2 antenna of Rhodobacter sphaeoides as revealed by relative difference absorption measurements of the LH2 antenna and the B820 subunit

Article Abstract:

A relative difference absorption (pump-probe) is used to measure the B820 subunit of Rhodospirillum rubrum and the LH2 antenna of the Rhodobacter sphaeroides. The measurements are compared.

Research and Development in the Physical, Engineering, and Life Sciences, Chemistry, Analysis, Biological research, Chemical research

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