The Primary Electron Transfer in Photosynthetic Purple Bacteria: Long Range Electron Transfer in the Femtosecond Domain at Low Temperature
The conversion of light energy into chemical free energy in the reaction center (RC) of photosynthetic purple bacteria is a highly efficient process which involves very fast initial reactions able to efficiently compete with radiative lifetimes. The primary charge separation occurs between a bacteriochlorophyll dimer (P) and a bacteriopheophytin molecule (HL) located on the side of the L polypeptide subunit. The structure of the RC, as solved by X-ray crystallography, shows that a monomeric bacteriochlorophyll (BL) is located in between P and HL. The role of this molecule in the initial charge separation process is not yet understood and is the object of much current experimental and theoretical scrutinity.
KeywordsElectron Transfer Electron Transfer Rate Ground State Absorption Primary Charge Separation Chemical Free Energy
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