EXCITED-STATES AND ELECTRON-TRANSFER MECHANISM IN THE PHOTOSYNTHETIC REACTION-CENTER OF RHODOPSEUDOMONAS-VIRIDIS - SAC-CI STUDY

The symmetry adapted cluster (SAC)-configuration interaction (CI) meth od has been utilized to assign the excited states in absorption and li near dichroism spectra and to clarify the mechanism of the unidirectio nality in the electron transfer of the photosynthetic reaction center of Rhodopseudomonas viridis. We have calculated the ground, excited, i onized, and electron-attached states of all the chromophores in the re action center. The protein effects were included with the use of the p oint-charge model. (C) 1998 Elsevier Science B.V. All rights reserved.