[Electron transport in the chlorophyll aggregate oxidation reaction].
Flash photolysis study was carried out of electron transfer during rho-benzoquinone-photooxidation of monomeric and aggregated molecules of chlorophyll "a" in aqueous solutions of serum albumin and triton X-100. It has been found that in the presence of rho-benzoquinone oxidation of monomeres and aggregates of chlorophyll takes place; it results in the formation of the pigment cation-radicals. The kinetic analysis of the pattern of electron transfer during aggregates photooxidation enables a conclusion that oxidation proceeds only via the triplet state of the pigment molecules. Study of the transformation of cation-radicals of monomeres and aggregates showed a difference in the death of radicals. For chlorophyll monomeres the death of cation-radicals is described by the 2nd order equation and is conditioned by the recombination of ion-radicals of the pigment and acceptor. The death of aggregate cation-radicals proceeds according to the 1st order reaction. The results obtained point to possible participation of chlorophyll triplet state in primary photochemical reactions of photosynthesis.
D016227:Benzoquinones; D055598:Chemical Phenomena; D002621:Chemistry; D002734:Chlorophyll / Q000378:metabolism*; D004579:Electron Transport; D004735:Energy Transfer; D007700:Kinetics; D017830:Octoxynol; D010084:Oxidation-Reduction; D010788:Photosynthesis; D011092:Polyethylene Glycols; D011809:Quinones; D012709:Serum Albumin
D016227:Benzoquinones; D011809:Quinones; D012709:Serum Albumin; D002734:Chlorophyll; C004532:quinone; D011092:Polyethylene Glycols; D017830:Octoxynol
Perenos élektrona v reaktsii okisleniia agregatov khlorofilla.