Abstract
Semiempirical molecular orbital treatments provide a useful framework for relating the reaction center’s structure to its unusual spectroscopic properties and to the interaction matrix elements that govern the rates of electron transfer. Such treatments encounter a number of obstacles, but perhaps the most difficult of these is to evaluate the interactions of atoms that are relatively far apart, where interatomic resonance integrals are not well calibrated. Alternative approaches to this problem have led to diverging opinions concerning the resonance interactions that mix intramolecular transitions with charge-transfer transitions of the special pair of BChls.* Many of the RC’s spectroscopic properties can be rationalized either by strong interactions with a charge-transfer state that lies considerably higher in energy than the Qy transitions of the BChls, or by weaker interactions with a state that lies closer in energy.1–3
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Abbreviations
- BChl:
-
bacteriochlorophyll
- c.i.:
-
configuration-interaction
- HOMO:
-
highest occupied molecular orbital
- LUMO:
-
lowest normally unoccupied molecular orbital
- P:
-
special pair of BChls (PL and PM).
References
L. K. Hanson, Photochem. Photobiol. 47: 903–921 (1988).
R. A. Friesner and Y. Won, Biochim. Biophys. Acta 977: 99–122 (1989).
A. Warshel and W. W. Parson, Ann. Rev. Phys. Chem. 42: 279–309 (1991).
J. J. Katz, L. L. Shipman, and J. R. Norris, Ciba Foundation Symp. (new series) 61: 1–34 (1979).
W. W. Parson, Z.-T. Chu, and A. Warshel, Biochim. Biophys. Acta 1017: 251–272(1990).
J. Breton, E. Nabedryk, and W. W. Parson, Biochem. in press (1992).
D. Davis, A. Dong, W. S. Caughey, and C. C. Schenck, These Proceedings.
A. Warshel, and W. W. Parson, J. Am. Chem. Soc. 109: 6143–6152 (1987).
W. W. Parson, and A. Warshel, J. Am. Chem. Soc. 109: 6152–6163 (1987).
J. Deisenhofer, and H. Michel, Science 245: 1463–1473 (1989).
O. El-Kabbani, C. -H. Chang, D. Tiede, J. Norris, and M. Schiffer, Biochem. 30: 5361–5369 (1991).
C. Weiss, J. Mol. Spectrosc. 44: 37–80 (1977).
F. Lendzian, W. Lubitz, H. Scheer, A. J. Hoff, M. Plato, E. Trankle, and K. Möbius, Möbius K. Chem. Phys. Lett. 148: 377–385 (1988).
M. Huber, R. A. Isaacson, E. C. Abresch, G. Feher, D. Gaul, and C. C. Schenck, These Proceedings.
D. Kleinfeld, M. Y. Okamura, and G. Feher, Biochem. 23: 5780–5786 (1984).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1992 Springer Science+Business Media New York
About this chapter
Cite this chapter
Parson, W.W., Nabedryk, E., Breton, J. (1992). Mid- and Near-IR Electronic Transitions of P+: New Probes of Resonance Interactions and Structural Asymmetry in Reaction Centers. In: Breton, J., Verméglio, A. (eds) The Photosynthetic Bacterial Reaction Center II. Nato ASI Series, vol 237. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3050-3_10
Download citation
DOI: https://doi.org/10.1007/978-1-4615-3050-3_10
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-6330-9
Online ISBN: 978-1-4615-3050-3
eBook Packages: Springer Book Archive