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Pulse radiolysis of methylene blue and toluidine blue in PVA |
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| Authors: | H. Jia S. Navaratnam W. Chen B. J. Parsons G. O. Phillips |
| Affiliation: | a Department of Chemistry, Beijing Normal University, Beijing, China b Multidisciplinary Research and Innovation Centre, Faculty of Science, Health and Medical Studies, The North East Wales Institute, Deeside, Clwyd. CH5 4BR., U.K. |
| Abstract: | Pulse radiolysis experiments were carried out with aqueous solutions of thionine dye methylene blue (MB) and toluidine blue in the presence of polyvinyl alcohol. The transient spectra obtained show maxima at 400 and 880 nm and are assigned to the respective semiquinone radical anions. The semiquinone radical decayed by a second order process. Furthermore, MB in PVA films were bleached by γ-radiolysis and the change in absorption was found to be linear with the dose. |
| Keywords: | dosimeter dosifilm methylene blue toluidine blue thionine polyvinyl alcohol pulse radiolysis radiation γ-radiolysis |
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