Pflock, T.J., Oellerich, S., Southall, J. , Cogdell, R.J. , Ullmann, G.M. and Köhler, J. (2011) The electronically excited states of LH2 complexes from Rhodopseudomonas acidophila strain 10050 studied by time-resolved spectroscopy and dynamic Monte Carlo simulations. I. Isolated, non-interacting LH2 complexes. Journal of Physical Chemistry B, 115(28), pp. 8813-8820. (doi: 10.1021/jp202353c)
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Publisher's URL: http://dx.doi.org/10.1021/jp202353c
Abstract
We have employed time-resolved spectroscopy on the picosecond time scale in combination with dynamic Monte Carlo simulations to investigate the photophysical properties of light-harvesting 2 (LH2) complexes from the purple photosynthetic bacterium Rhodopseudomonas acidophila. The variations of the fluorescence transients were studied as a function of the excitation fluence, the repetition rate of the excitation and the sample preparation conditions. Here we present the results obtained on detergent solubilized LH2 complexes, i.e., avoiding intercomplex interactions, and show that a simple four-State model is sufficient to grasp the experimental observations quantitatively without the need for any free parameters. This approach allows us to obtain a quantitative measure for the singlet-triplet annihilation rate in isolated, noninteracting LH2 complexes.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Cogdell, Professor Richard and Southall, Mrs June |
Authors: | Pflock, T.J., Oellerich, S., Southall, J., Cogdell, R.J., Ullmann, G.M., and Köhler, J. |
Subjects: | Q Science > QD Chemistry |
College/School: | College of Medical Veterinary and Life Sciences > School of Molecular Biosciences |
Journal Name: | Journal of Physical Chemistry B |
Journal Abbr.: | J. Phys. Chem. B |
ISSN: | 1520-6106 |
ISSN (Online): | 1520-5207 |
Published Online: | 07 June 2011 |
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