Kinetics and Mechanisms of Photo-Induced Reduction of Iodine by Diamine-<i>N</i>-polycarboxylate Ions in an Aqueous Solution

DOI DOI PDF PDF 被引用文献2件 参考文献10件 オープンアクセス
  • Masaru Kimura
    Department of Chemistry, Faculty of Science, Nara Women’s University
  • Akiko Ohomura
    Department of Chemistry, Faculty of Science, Nara Women’s University
  • Fumiko Nakazawa
    Department of Chemistry, Faculty of Science, Nara Women’s University
  • Keiichi Tsukahara
    Department of Chemistry, Faculty of Science, Nara Women’s University

書誌事項

公開日
1991-06-01
権利情報
  • https://academic.oup.com/pages/standard-publication-reuse-rights
DOI
  • 10.1246/bcsj.64.1872
  • 10.1246/bcsj.65.1812
公開者
Oxford University Press (OUP)

この論文をさがす

説明

<jats:title>Abstract</jats:title> <jats:p>Although the reduction of iodine by diamine-N-polycarboxylate ions such as ethylenediaminetetraacetic acid, trans-1,2-cyclohexanediaminetetraacetic acid, N-(2-hydroxyethyl)ethylenediamine-N,N′,N′-triacetic acid, and ethylenediamine-N,N′-diacetic acid was negligible in the dark, it occurred greatly upon irradiation with visible light of an aqueous solution over the pH range 4–8. The rate of the photo-sensitized reaction was of half-order regarding both the light intensity irradiated and the concentrations of iodine, which correspond to those of the triiodide ion in the presence of excess iodide ions, and was proportional to the concentration of the diamine-N-polycarboxylate ion. Further, the rate was of half-order for concentrations of I− below 3×10−4 mol dm−3 and was of inversely half-order for concentrations of I− above 6×10−4 mol dm−3. The reaction was inhibited by radical scavengers of acrylonitrile, acrylamide, and hexaamminecobalt(III) ions. Both hydrogen ion and complex forming metal ions, such as copper(II) and zinc(II), are also strong inhibitors of the reaction. The reaction mechanism, where initiation reaction is a photo-dissociation of iodine and the reactive species is a I2\divdot radical anion, is proposed to account for the obtained results.</jats:p>

収録刊行物

被引用文献 (2)*注記

もっと見る

参考文献 (10)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ