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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/102/02/0147-0157

    • Keywords

       

      Pulse radiolysis; one-electron oxidation; toluidine blue; thiazine dyes

    • Abstract

       

      The one-electron oxidation of toluidine blue by specific oxidising radicals such as Cl2−, Tl(II), N3, Br2− etc. has been studied by employing the pulse radiolysis technique. The Br2− radical was found to be less efficient in oxidising toluidine blue as compared to Cl2−., Tl+2 and N3. The semioxidised species exhibited only onepKa indicating the presence of two conjugate acid-base forms whose spectral and kinetic features were evaluated. Reaction of OH radicals with the dye gave rise to a transient species which exhibited spectral and kinetic features different from that of the semioxidised species indicating that the mode of reaction of OH is different.

    • Author Affiliations

       

      J Mahadevan1 S N Guha1 K Kishore1 P N Moorthy1

      1. Chemistry Division, Bhabha Atomic Research Centre, Bombay - 400 085, India

    • Dates

       
      Published
      April 1990
      Manuscript received
      9 March 1989
      Manuscript revised
      3 August 1989

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