One-electron oxidation of toluidine blue. A pulse radiolysis study
- 15 Downloads
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.
KeywordsPulse radiolysis one-electron oxidation toluidine blue thiazine dyes
Unable to display preview. Download preview PDF.
- Fielden E M 1984 inThe study of fast processes and transient species by electron pulse radiolysis (eds) J H Baxendale and F Busi (Boston: D Reidel) p. 59Google Scholar
- Guha S N, Moorthy P N, Kishore K Naik D B and Rao K N 1987Proc. Indian Acad. Sci. (Chem. Sci.) 99 261Google Scholar
- Kamat P V, Karkhanavala M D and Moorthy P N 1979Indian J. Chem. A18 206, 210Google Scholar
- Kishore K, Guha S N and Moorthy P N 1987Proc. Indian Acad. Sci. (Chem. Sci.) 99 351Google Scholar
- Kishore K, Guha S N, Mahadevan J Moorthy P N and Mittal J P 1989Radiat. Phys. Chem. 34 721Google Scholar
- Mahadevan J, Guha S N, Kishore K and Moorthy P N 1989Proc. Indian Acad. Sci. (Chem. Sci.) 101 43Google Scholar