Kinetics of O2(1Δg) photo-oxidation reactions in egg-yolk lecithin vesicles
- 1 January 1986
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 82 (5), 1627-1635
- https://doi.org/10.1039/f19868201627
Abstract
The photosensitized oxidation of single bilayer vesicles of egg-yolk lecithin by singlet oxygen is investigated. The isotopic enhanced lifetime of singlet oxygen in heavy water, and the inhibitory effect of azide ions, are both used to examine the O2(1Δg) diffusion characteristics. The rate of photo-oxidation of unsaturated fatty acid is shown to be strongly dependent on the precise location of the sensitizer in the bilayer. Rate constants for the interaction of singlet oxygen with the lipid, with the acceptor 9,10-dimethylanthracene and with azide are determined to be 7.5 × 105, 3.2 × 108 and 1.0 × 108 dm3 mol–1 s–1, respectively.Keywords
This publication has 9 references indexed in Scilit:
- TYPE I AND TYPE II MECHANISMS IN THE PHOTOSENSITIZED LYSIS OF PHOSPHATIDYLCHOLINE LIPOSOMES BY HEMATOPORPHYRINPhotochemistry and Photobiology, 1982
- A rapid method for the preparation of microvesicles of egg yolk lecithinBiochimica et Biophysica Acta (BBA) - Biomembranes, 1982
- A LASER FLASH KINETIC SPECTROPHOTOMETRIC EXAMINATION OF THE DYNAMICS OF SINGLET OXYGEN IN UNILAMMELLAR VESICLESPhotochemistry and Photobiology, 1982
- THE ROLE OF SINGLET OXYGEN IN PHOTOOXIDATION OF EXCITABLE CELL MEMBRANESPhotochemistry and Photobiology, 1979
- Production and Reaction of Singlet Oxygen in Aqueous Micellar Solutions Using Pyrene as PhotosensitizerZeitschrift für Naturforschung B, 1978
- THE PHOTOSENSITIZED FORMATION AND REACTION OF SINGLET OXYGEN, O2*(1Δ), IN AQUEOUS MICELLAR SYSTEMSPhotochemistry and Photobiology, 1976
- REACTIVITY OF CHOLESTEROL AND SOME FATTY ACIDS TOWARD SINGLET OXYGENPhotochemistry and Photobiology, 1974
- The thiobarbituric acid reaction and the autoxidations of polyunsaturated fatty acid methyl estersArchives of Biochemistry and Biophysics, 1962
- 9 Ultra-violet spectrophotometry of fatty acidsProgress in the Chemistry of Fats and other Lipids, 1957