2024-03-29T00:08:08Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/426072016-11-14T12:03:48Zcom_10261_75com_10261_6col_10261_328
2011-11-21T10:48:36Z
urn:hdl:10261/42607
Effects of the distributions of energy or charge transfer rates on spectral hole burning in pigment-protein complexes at low temperatures
Herascu, Nicoleta
Ahmouda, Somaya
Picorel Castaño, Rafael
Seibert, Michael
Jankowiak, Ryszard J.
Zazubovich, Valter
photosynthesis
spectroscopy
CP43
photosystem II reaction center
51 Pags, 2 Tabls., 7 Figs. The definitive version is available at: http://pubs.acs.org/journal/jpcbfk
Effects of the distributions of excitation energy transfer (EET) rates (homogeneous line widths) on the non-photochemical (resonant) spectral hole burning (SHB) processes in photosynthetic chlorophyll-protein complexes (reaction center [RC] and CP43 antenna of Photosystem II from spinach) are considered. It is demonstrated that inclusion of such a distribution results in somewhat more dispersive hole burning kinetics. More importantly, however, inclusion of the EET rate distributions strongly affects the dependence of the hole width on the fractional hole depth. Different types of line width distributions have been explored, including those resulting from Förster type EET between weakly interacting pigments as well as Gaussian ones, which may be a reasonable approximation for those resulting, for instance, from so-called extended Förster models. For Gaussian line width distributions it is possible to determine the parameters of both line width and tunneling parameter distributions from SHB data without a priori knowledge of any of them. Concerning more realistic asymmetric distributions, we demonstrate, using the simple example of CP43 antenna, that one can use SHB modeling to estimate electrostatic couplings between pigments and support or exclude assignment of certain pigment(s) to a particular state.
2011-11-21T10:48:36Z
2011-11-21T10:48:36Z
2011-11
artículo
Herascu N, Ahmouda S, Picorel R, Siebert M, Jankowiak, RJ, Zazubovich V. Effects of the distributions of energy or charge transfer rates on spectral hole burning in pigment-protein complexes at low temperatures. Journal of Physical Chemistry B 115 (50): 15098–15109 (2011)
1520-6106
http://hdl.handle.net/10261/42607
10.1021/jp208142k
1520-5207
eng
http://dx.doi.org/10.1021/jp208142k
openAccess
American Chemical Society