CHLOROPHYLL SENSITIZED CHARGE SEPARATION IN PHOSPHOLIPID VESICLES

Abstract

Abstract— Chlorophyll (chl) a in sonicated egg yolk lecithin vesicles, even with local concentrations of 0.1 M, exists in its monomeric form as is evident by the absorption, circular dichroic and EPR spectra of such suspensions. With the water soluble oxidants, K3Fe(CN)6 or SmCl3, it is possible to photoproduce the chl cation radical. With K3Fe(CN)6 as acceptor the formation and decay kinetics can be explained by a second order process influenced by diffusion of the water soluble components in this heterogenous system. With the exception of an iron‐sulfur protein isolated from Rhodospirillum ruhrum, we have not detected a photochemical reaction of chl with various iron‐sulfur proteins or ubiquinone. Copyright © 1975, Wiley Blackwell. All rights reserved