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One-electron oxidation of toluidine blue. A pulse radiolysis study

  • J Mahadevan
  • S N Guha
  • K Kishore
  • P N Moorthy
Physical and Theoretical
  • 15 Downloads

Abstract

The one-electron oxidation of toluidine blue by specific oxidising radicals such as Cl 2 , Tl(II), N3, Br 2 etc. has been studied by employing the pulse radiolysis technique. The Br 2 radical was found to be less efficient in oxidising toluidine blue as compared to Cl 2 ., Tl+2 and N3. The semioxidised species exhibited only onepK a 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.

Keywords

Pulse radiolysis one-electron oxidation toluidine blue thiazine dyes 

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Copyright information

© Indian Academy of Sciences 1990

Authors and Affiliations

  • J Mahadevan
    • 1
  • S N Guha
    • 1
  • K Kishore
    • 1
  • P N Moorthy
    • 1
  1. 1.Chemistry DivisionBhabha Atomic Research CentreBombayIndia

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