Literature DB >> 24271705

Site inhomogeneity and exciton delocalization in the photosynthetic antenna.

T V Dracheva1, V I Novoderezhkin, A P Razjivin.   

Abstract

The influence of energy disorder on exciton states of molecular aggregates (the dimer and the circular aggregate) was analyzed. The dipole strength and inhomogeneous line shapes of exciton states were calculated by means of numerical diagonalization of Hamiltonian with diagonal energy disorder without intersite correlation. The disorder degree corresponding to destruction of coherent exciton states was estimated. The circular aggregates were treated as a model of light-harvesting antenna structures of photosynthetic bacteria. It was concluded that the site inhomogeneity typical for LH1 and LH2 complexes of purple bacteria cannot significantly influence the exciton delocalization over the whole antenna.

Entities:  

Year:  1996        PMID： 24271705     DOI： 10.1007/BF00034788

Source DB:  PubMed          Journal:  Photosynth Res        ISSN： 0166-8595            Impact factor:   3.573


  13 in total

1.  The light-harvesting core-complex and the B820-subunit from Rhodopseudomonas marina. Part II. Electron microscopic characterisation.

Authors:  R U Meckenstock; K Krusche; R A Brunisholz; H Zuber
Journal:  FEBS Lett       Date:  1992-10-19       Impact factor: 4.124

2.  Stoichiometric model of the photosynthetic unit of Ectothiorhodospira halochloris.

Authors:  H Engelhardt; A Engel; W Baumeister
Journal:  Proc Natl Acad Sci U S A       Date:  1986-12       Impact factor: 11.205

3.  Exciton states of the antenna and energy trapping by the reaction center.

Authors:  V I Novoderezhkin; A P Razjivin
Journal:  Photosynth Res       Date:  1994-10       Impact factor: 3.573

4.  Excitation delocalization over the whole core antenna of photosynthetic purple bacteria evidenced by non-linear pump-probe spectroscopy.

Authors:  V I Novoderezhkin; A P Razjivin
Journal:  FEBS Lett       Date:  1995-07-17       Impact factor: 4.124

5.  Excitonic interactions in the light-harvesting antenna of photosynthetic purple bacteria and their influence on picosecond absorbance difference spectra.

Authors:  V I Novoderezhkin; A P Razjivin
Journal:  FEBS Lett       Date:  1993-09-06       Impact factor: 4.124

6.  Energy transfer in the inhomogeneously broadened core antenna of purple bacteria: a simultaneous fit of low-intensity picosecond absorption and fluorescence kinetics.

Authors:  T Pullerits; K J Visscher; S Hess; V Sundström; A Freiberg; K Timpmann; R van Grondelle
Journal:  Biophys J       Date:  1994-01       Impact factor: 4.033

7.  Femtosecond pump-probe analysis of energy and electron transfer in photosynthetic membranes of Rhodobacter capsulatus.

Authors:  W Xiao; S Lin; A K Taguchi; N W Woodbury
Journal:  Biochemistry       Date:  1994-07-12       Impact factor: 3.162

8.  Energy migration and trapping in a spectrally and spatially inhomogeneous light-harvesting antenna.

Authors:  O J Somsen; F van Mourik; R van Grondelle; L Valkunas
Journal:  Biophys J       Date:  1994-05       Impact factor: 4.033

9.  The structure of the photoreceptor unit of Rhodopseudomonas viridis.

Authors:  W Stark; W Kühlbrandt; I Wildhaber; E Wehrli; K Mühlethaler
Journal:  EMBO J       Date:  1984-04       Impact factor: 11.598

10.  The 8.5 A projection map of the light-harvesting complex I from Rhodospirillum rubrum reveals a ring composed of 16 subunits.

Authors:  S Karrasch; P A Bullough; R Ghosh
Journal:  EMBO J       Date:  1995-02-15       Impact factor: 11.598
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