Transient intermediate produced from 5-aminouracil in reaction with dichloride anion radical.
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概要
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A transient absorption, which is relatively long-lived, was found in a flash photolysis of aqueous potassium chloride containing 5-aminouracil. The transient absorption with a peak at about 335 nm was assigned to an intermediate produced from 5-aminouracil through a one-electron oxidation by dichloride anion radical. For the intermediate, a possible structure is proposed to explain its long life-time. On the basis of the transient absorption, a determination of the rate constant for the reaction of 5-aminouracil with dichloride anion radical was carried out by use of a competition kinetics. The value of (2.9±0.2)×10<SUP>8</SUP> dm<SUP>3</SUP> mol<SUP>−1</SUP> s<SUP>−1</SUP> was obtained as the rate constant on the basis of rate constants of several reference compounds. By comparing the values obtained by the competition method with those estimated by a direct analysis of the decay rate of dichloride anion radical, the validity of the competition method was examined.
- 公益社団法人 日本化学会の論文
著者
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Masuda Takahiro
Department Of Obstetrics And Gynecology School Of Medicine Keio University
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Yamauchi Kotaro
Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
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Kimura Takako
Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
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Gunji Ryoji
Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
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MASUDA Takahiro
Department of Anesthesiology, Tokyo Metropolitan Ohtsuka Hospital
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