Guha, S. N. ; Moorthy, P. N. ; Mittal, J. P. (1992) Pulse radiolysis study of redox reactions of safranine T in aqueous solutions: one electron oxidation International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry, 39 (2). pp. 183-190. ISSN 1359-0197
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/135901...
Related URL: http://dx.doi.org/10.1016/1359-0197(92)90039-I
Abstract
One electron oxidation of safranine T by specific oxidizing radicals such as Cl-2, Tl2+, Tl(OH)+, N·3, Br-2 etc. has been studied using the nanosecond pulse radiolysis technique. Reaction of free Br· atom has also been investigated at neutral pH. The semioxidized safranine species formed by these reactions have been shown to exist in two conjugate acid-base forms with pKa=4.0. Their spectral and kinetic parameters have been evaluated. Using N·3/N-3 and I-2/2I- as reference couples, the one electron reduction potential of the semioxidized safranine has been determined to be 1.13± 0.02 V vs NHE. The absorption spectra, second order decay rate constant and the pKa of the OH-reaction product revealed features quite different from that of the semioxidized species suggesting that the mode of OH reaction is not via electron abstraction.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 25846 |
| Deposited On: | 04 Dec 2010 11:30 |
| Last Modified: | 08 Jun 2011 05:15 |
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