Oxidation of lipids. II. Rate of inhibition of oxidation by .ALPHA.-tocopherol and hindered phenols measured by chemiluminescence.
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概要
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The rate constants for the interactions of peroxyl radicals with α-tocopherol and hindered phenols were determined by chemiluminescence method. The thermal decomposition of di-<I>t</I>-butyl diperoxyoxalate in <I>o</I>-dichlorobenzene with and without ethylbenzene was found to give chemiluminescence under oxygen. 9,10-Dibromoanthracene was an effective activator. The addition of 1-tetralyl hydroperoxide gave chemiluminescence both in the presence and absence of oxygen, while the addition of <I>t</I>-butyl hydroperoxide suppressed the chemiluminescence almost completely even under oxygen. The addition of α-tocopherol and phenols also diminished the chemiluminescence, but after reaching the minimum intensity it again increased as the inhibitors were consumed. The rate constants for the scavenging of 1-phenylethylperoxyl radical by α-tocopherol, 2,4,6-tri-<I>t</I>-butylphenol and 2,6-di-<I>t</I>-butyl-4-methylphenol were obtained as 1.5×10<SUP>5</SUP>, 1.2×10<SUP>4</SUP>, and 1.0×10<SUP>4</SUP> M<SUP>−1</SUP> s<SUP>−1</SUP> (1 M=1 mol dm<SUP>−3</SUP>) respectively.
- 公益社団法人 日本化学会の論文
著者
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Kamiya Yoshio
Department of Applied Chemistry Faculty of Engineering The University of Tokyo
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Niki Etsuo
Department of Reaction Chemistry, Faculty of Engineering, The University of Tokyo
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Tanimura Ritsuko
Department of Reaction Chemistry, Faculty of Engineering, The University of Tokyo
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