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  • Photosynthesis starts with the absorption of a solar photon by one of the light-harvesting (LH) pigment-protein complexes and transferring the excitation energy to the reaction center where a charge separation is initiated. Knowledge of the microscopic structure of some photosynthetic systems and their function invokes during last twenty years long and intensive investigation of many theoretical and experimental laboratories. The geometric structure of LH complexes is known in great detail, e.g. for the LH2 and LH4 complexes of purple bacteria. Absorption and steady state fluorescence spectra for ring molecular systems are presented. The peripheral cyclic antenna unit LH4 of the bacterial photosystem from purple bacteria can be modeled by such system. The cumulant-expansion method of Mukamel et al. is used for the calculation of spectral responses of the system with exciton-phonon coupling. Dynamic disorder, interaction with a bath, in Markovian approximation simultaneously with uncorrelated static disorder in transfer integrals are taking into account in our simulations. We compare calculated absorption and steady state fluorescence spectra for LH4 ring obtained within the full Hamiltonian model with our previous results within nearest neighbour approximation model for uncorrelated static disorder in transfer integrals. All calculations were done in software package Mathematica.
  • Photosynthesis starts with the absorption of a solar photon by one of the light-harvesting (LH) pigment-protein complexes and transferring the excitation energy to the reaction center where a charge separation is initiated. Knowledge of the microscopic structure of some photosynthetic systems and their function invokes during last twenty years long and intensive investigation of many theoretical and experimental laboratories. The geometric structure of LH complexes is known in great detail, e.g. for the LH2 and LH4 complexes of purple bacteria. Absorption and steady state fluorescence spectra for ring molecular systems are presented. The peripheral cyclic antenna unit LH4 of the bacterial photosystem from purple bacteria can be modeled by such system. The cumulant-expansion method of Mukamel et al. is used for the calculation of spectral responses of the system with exciton-phonon coupling. Dynamic disorder, interaction with a bath, in Markovian approximation simultaneously with uncorrelated static disorder in transfer integrals are taking into account in our simulations. We compare calculated absorption and steady state fluorescence spectra for LH4 ring obtained within the full Hamiltonian model with our previous results within nearest neighbour approximation model for uncorrelated static disorder in transfer integrals. All calculations were done in software package Mathematica. (en)
Title
  • Simulation of Emission Spectra for LH4 Ring: Intermolecular Coupling Fluctuation Effect
  • Simulation of Emission Spectra for LH4 Ring: Intermolecular Coupling Fluctuation Effect (en)
skos:prefLabel
  • Simulation of Emission Spectra for LH4 Ring: Intermolecular Coupling Fluctuation Effect
  • Simulation of Emission Spectra for LH4 Ring: Intermolecular Coupling Fluctuation Effect (en)
skos:notation
  • RIV/00216275:25410/14:39898845!RIV15-MSM-25410___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I, S
http://linked.open...iv/cisloPeriodika
  • 1
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 44980
http://linked.open...ai/riv/idVysledku
  • RIV/00216275:25410/14:39898845
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Mathematica; exciton states; static and dynamic disorder; absorption and fluorescence spectrum; LH4 (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [04B3589C9566]
http://linked.open...i/riv/nazevZdroje
  • International Journal of Mathematics and Computers in Simulation
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 8
http://linked.open...iv/tvurceVysledku
  • Heřman, Pavel
  • Zapletal, David
issn
  • 1998-0159
number of pages
http://localhost/t...ganizacniJednotka
  • 25410
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