Kinetics of Charge Separation and Energy Transfer in Photosystem II Reaction Center

In the present study we investigated the kinetics of the initial charge separation and energy transfer in the PS II reaction center using pico-second and femto-second time-resolved techniques. We conclude that there are energy transfer processes between ß-Car or Pheo and P680 in the PSII reaction center. The time constant of energy transfer from Pheo to P680 is less than 100 ps, while that from (ß-Car to P680 is about 350 ps. For the initial charge separation in the PS II reaction center, the preliminary finding supported the about 3-ps time constant of charge separation. The possible kinetic scheme in PS II reaction center was proposed. Further experiments are in progress.