scholarly journals Towards a quantitative description of excitonic couplings in photosynthetic pigment-protein complexes: quantum chemistry driven multiscale approaches

2022 ◽  
Author(s):  
Christian Friedl ◽  
Dmitri G. Fedorov ◽  
Thomas Renger
Keyword(s):  
Quantum Chemistry ◽  
Photosynthetic Pigments ◽  
Protein Complexes ◽  
Photosynthetic Pigment ◽  
Quantitative Description ◽  
Reaction Field ◽  
Quantitative Calculation ◽  
Pigment Protein Complexes ◽  
Solvent Environment

A structure-based quantitative calculation of excitonic couplings between photosynthetic pigments has to describe the dynamical polarization of the protein/solvent environment of the pigments, giving rise to reaction field and screening...

scholarly journals Electrostatic profiling of photosynthetic pigments: implications for directed spectral tuning

2021 ◽  
Author(s):  
Abhishek Sirohiwal ◽  
Dimitrios Pantazis
Keyword(s):  
Solar Energy ◽  
Quantum Efficiency ◽  
Photosynthetic Pigments ◽  
Spectral Properties ◽  
Protein Complexes ◽  
Photosynthetic Pigment ◽  
Protein Scaffolds ◽  
Spectral Tuning ◽  
Pigment Protein Complexes

Photosynthetic pigment-protein complexes harvest solar energy with quantum efficiency. Protein scaffolds are known to tune the spectral properties of the embedded pigments mainly through a structured electrostatic environment. However, the...

Two-photon excitation spectroscopy of photosynthetic light-harvesting complexes and pigments

2019 ◽  
Vol 216 ◽  
pp. 494-506 ◽  
Author(s):  
Alexander Betke ◽  
Heiko Lokstein
Keyword(s):  
Spectral Region ◽  
Protein Complexes ◽  
Photosynthetic Pigment ◽  
Photon Absorption ◽  
Light Harvesting Complexes ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photon Excitation ◽  
Pigment Protein Complexes ◽  
Two Photon Excitation

Two-photon excitation (TPE) profiles of LHCII samples containing different xanthophyll complements were measured in the presumed 11Ag− → 21Ag− (S0 → S1) transition region of xanthophylls. Additionally, TPE profiles of Chls a and b in solution and of WSCP, which does not contain carotenoids, were measured. The results indicate that direct two-photon absorption by Chls in the presumed S0 → S1 transition spectral region of carotenoids is dominant over that of carotenoids, with negligible contributions of the latter. These results suggest the re-evaluation of previously published TPE data obtained with photosynthetic pigment–protein complexes containing (B)Chls and carotenoids.

Redox Conditions Affect Ultrafast Exciton Transport in Photosynthetic Pigment–Protein Complexes

2017 ◽  
Vol 9 (1) ◽  
pp. 89-95 ◽  
Author(s):  
Marco A. Allodi ◽  
John P. Otto ◽  
Sara H. Sohail ◽  
Rafael G. Saer ◽  
Ryan E. Wood ◽  
...  
Keyword(s):  
Protein Complexes ◽  
Photosynthetic Pigment ◽  
Redox Conditions ◽  
Exciton Transport ◽  
Pigment Protein Complexes
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