title: The electronically excited states of LH2 complexes from Rhodopseudomonas acidophila strain 10050 studied by time-resolved spectroscopy and dynamic Monte Carlo simulations. II. Homo-arrays of LH2 complexes reconstituted into phospholipid model membranes.
abstract: We performed time-resolved spectroscopy on homoarrays of LH2 complexes from the photosynthetic purple bacterium Rhodopseudomonas acidophila. Variations of the fluorescence transients were monitored as a function of the excitation fluence and the repetition rate of the excitation. These parameters are directly related to the excitation density within the array and to the number of LH2 complexes that still carry a triplet state prior to the next excitation. Comparison of the experimental observations with results from dynamic Monte Carlo simulations for a model cluster of LH2 complexes yields qualitative agreement without the need for any free parameter and reveals the mutual relationship between energy transfer and annihilation processes.
authors.affiliation: Experimental Physics IV and BIMF, University of Bayreuth, D-95440 Bayreuth, Germany.
authors.forename: Tobias J
authors.initials: TJ
authors.lastname: Pflock
authors.forename: Silke
authors.initials: S
authors.lastname: Oellerich
authors.forename: Lisa
authors.initials: L
authors.lastname: Krapf
authors.forename: June
authors.initials: J
authors.lastname: Southall
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Cogdell
authors.forename: G Matthias
authors.initials: GM
authors.lastname: Ullmann
authors.forename: Jürgen
authors.initials: J
authors.lastname: Köhler
mesh_terms: D003198:Computer Simulation; D004583:Electrons; D045342:Light-Harvesting Protein Complexes / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D008954:Models, Biological; D009010:Monte Carlo Method; D010743:Phospholipids / Q000737:chemistry*; D012241:Rhodopseudomonas / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D045342:Light-Harvesting Protein Complexes; D010743:Phospholipids