Table of Contents
Wavepacket Dynamics
Two methods for determining FC
The sum-over-states method
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The wavepacket picture
Dynamics in the Photosynthetic Reaction Center (RC)
How does the reaction center capture light energy?
Energy Transfer to the RC
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Chromophores in the Bacterial Photosynthetic Reaction Center
A reaction scheme for charge separation and recombination
Hydraulic analogy for quantum yield
The small fluorescence quantum yield from P arises from the competition of electron transfer
Chromophores in the RC
The special pair is a dimer of BChl molecules
The primary charge separation rate is the most efficient electron transfer process known
The heterodimer is a mutant RC is that has one BChl and one Bpheo molecule
Absorption spectrum of the RC
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Definitions of electron and energy transfer processes
Both energy transfer and electron transfer can be written as a Fermi Golden Rule rate constant
The electronic coupling V is proportional to the overlap of electronic wavefunctions
The Franck-Condon factor is a nuclear overlap factor
The FC factor in absorption, energy, and electron transfer are all the same!
The FC factor can be expressed as a function of the energy gap and reorganization energy
The barrier height changes as a function of the energy gap
Marcus theory predicts a Gaussian dependence of rate on the energy gap
Spectroscopic observation of the primary charge separation
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