Contact Information
Department of Physics525 Northwestern Avenue
West Lafayette, IN
47907-2036
Map and Directions
Telephone:
(765) 494-2970
Fax:
(765) 494-0706
Ryszard Jankowiak
Kansas State University
Probing Electron Transfer Times in Photosynthetic Reaction Centers by Hole-Burning Spectroscopy
 |
Tuesday March 20, 2012
1:30pm PHYS 242
Coffee and doughnuts served at 1:15pm.
http://www.ksu.edu/chem/people/faculty/jankowiak.htmlA brief discussion of transient hole-burned (HB) spectra (and information they provide) obtained for isolated reaction centers (RCs) from wild-type (WT) Rhodobacter sphaeroides, RCs containing zinc-bacteriochlorophylls (Zn-BChls) and RCs of Photosystem II (PSII) from spinach and Chlamydomonas reinhardtii, is presented. Regarding bacterial RCs, the shape of the density of states and the strength of electron-phonon coupling are re-examined. I focus, however, on heterogeneity of isolated RCs from spinach and in particular Chlamydomonas reinhardtii, site-energies of active (electron acceptor) and inactive pheophytins, the nature of the primary electron donor(s), and the possibility of multiple charge-separation (CS) pathways in isolated PSII RC.