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CHEMISTRY OF SINGLET OXYGEN—XVIII. RATES OF REACTION AND QUENCHING OF α‐TOCOPHEROL AND SINGLET OXYGEN *
Author(s) -
Christopher S.,
Ching TaYen,
Geller George G.
Publication year - 1974
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1974.tb06611.x
Subject(s) - singlet oxygen , chemistry , quenching (fluorescence) , photochemistry , methylene blue , oxygen , singlet state , methanol , tocopherol , methylene , organic chemistry , antioxidant , catalysis , excited state , fluorescence , vitamin e , photocatalysis , physics , quantum mechanics , nuclear physics
—α‐Tocopherol scavenges singlet oxygen (produced by methylene blue photosensitization in methanol) by a combination of chemical reaction (4.6 times 10 7 M ‐1 s ‐1 ) and quenching (6.2 times 10 8 M ‐1 s ‐1 ). The total rate of scavenging (6.7 times 10 8 M ‐1 s ‐1 ) makes it an effective protective agent against photooxidation mediated by singlet oxygen.