Photochemical Reactions of Uranyl Ions with Organic Compounds. IV. The Uranyl Fluorescence Quenching by Aliphatic Alcohols

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概要

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• The relative rates for uranyl fluorescence quenching by aliphatic alcohols (methyl, ethyl, <I>n</I>-propyl, isopropyl, <I>n</I>-butyl, isobutyl, and <I>s</I>-butyl alcohols) were measured under various conditions. The rates were increased in proportion to the perchloric acid concentration at pH <1, whereas the rates were smaller and nearly constant at the pH's between 1–4; thus showing the involvement of both acid-dependent and acid-independent processes. Though the rates for both processes changed with the change in the alcohol structure (the polar substituent effect), the ratio of the two rate constants was nearly constant. The inhibitory effects of cupric ions (as a scavenger for the one-equivalent redox intermediates) suggested that the acid-dependent quenching process involves a two-equivalent redox or two consecutive one-equivalent redox steps between the same partners. The mechanisms of these quenching processes are discussed.

• 公益社団法人 日本化学会の論文

著者

• Sakuraba Shukichi

  Faculty of Engineering, Shizuoka University

• Matsushima Ryoka

  Faculty of Engineering, Shizuoka University

関連論文

• Photochemical Reactions of Uranyl Ions with Organic Compounds. IV. The Uranyl Fluorescence Quenching by Aliphatic Alcohols
• Photochemical Reactions of Uranyl Ions with Organic Compounds. II. The Mechanism of the Photo-Oxidation of Alcohols by Uranyl Ions
• Photochemical Reactions of Uranyl Ions with Organic Compounds. I. The Mechanism of the Uranyl Ion-Photosensitized Oxidation of Lactic Acid
• Photochemical Reactions of Uranyl Ions with Organic Compounds III. The Correlation between the Reaction Mode and the Pre-Equilibrium in the Photolysis of the Uranyl-lactate System

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