Models of ultrafast energy and electron transfers in bacterial reaction centers

In this paper, we present a microscopic model to describe the spectroscopy and dynamics for photosynthetic bacterial reaction centers (RCs). In this m odel, we propose eight vibrational modes and their Huang-Rhys factors for d ifferent electronic energy states, and the couplings between the electronic states. As applications, we have constructed steady state and ultrafast ti me-reserved spectra for the mutant RC of Rhodobacter (Rb.) sphaeroides R26. Our model can also treat the temperature effect on the spectroscopy and dy namics of RCs.