Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 18: Poster: Transport and Spectroscopy in Molecular Nanostructures (Intersectional Session with MO)
CPP 18.7: Poster
Dienstag, 15. März 2011, 18:00–20:00, P1
Quest for spatially correlated fluctuations in light-harvesting systems — •Carsten Olbrich1, Johan Strümpfer2, Klaus Schulten2, and Ulrich Kleinekathöfer1 — 1Jacobs University Bremen, Bremen, Germany — 2University of Illinois, Urbana, USA
Photosynthesis is one of the essential mechanisms in nature to harvest
energy for biochemical processes in plants and certain kinds of bacteria.
Specific pigment-protein complexes, so-called light-harvesting (LH)
complexes, have the function of absorbing light and transporting the energy
to the photosynthetic reaction center. A few years back, experimental
evidence has been reported for a coherent energy-transfer dynamics at 77 K
in FMO. Based on molecular dynamics simulations at ambient temperatures,
electronic structure calculations for the vertical excitation energies of
the individual bacteriochlorophylls along the trajectory have been
performed. Neither for the LH2 complex of Rhodospirillum
molischianum nor for the FMO complex of the bacterium
Chlorobaculum tepidum strong correlations have been found in the
energy fluctuations [1,2]. In addition, the obtained data can be used to
determine spectroscopic properties of the complexes [3].
[1] C. Olbrich, U. Kleinekathöfer, J. Phys. Chem. B. 114, 12427 (2010).
C. Olbrich, J. Strümpfer, K. Schulten, U. Kleinekathöfer, J. Phys. Chem. B. (in press).
C. Olbrich, J. Liebers, U. Kleinekathöfer, phys. stat. sol. (b) (in
press, DOI:10.1002/pssb.201000651).