Emission spectra of LH2 complex: full Hamiltonian model

Pavel Heřman (), David Zapletal and Milan Horák

The European Physical Journal B: Condensed Matter and Complex Systems, 2013, vol. 86, issue 5, 1-6

Abstract: In the present contribution we study the absorption and steady-state fluorescence spectra for ring molecular system, which can model B850 ring of peripheral light-harvesting complex LH2 from purple bacterium Rhodopseudomonas acidophila (Rhodoblastus acidophilus). LH2 is a highly symmetric ring of nine pigment-protein subunits, each containing two transmembrane polypeptide helixes and three bacteriochlorophylls (BChl). The uncorrelated diagonal static disorder with Gaussian distribution (fluctuations of local excitation energies) simultaneously with the diagonal dynamic disorder (interaction with a bath) in Markovian approximation is used in our simulations. We compare calculated absorption and steady state fluorescence spectra obtained within the full Hamiltonian model of the B850 ring with our previous results calculated within the nearest neighbour approximation model and also with experimental data. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Date: 2013
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DOI: 10.1140/epjb/e2013-30586-5

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