Gopidas, K. R. ; Kamat, Prashant V. (1990) Photochemistry in polymers: photoinduced electron transfer between phenosafranine and triethylamine in perfluorosulfonate membrane Journal of Physical Chemistry, 94 (11). pp. 4723-4727. ISSN 0022-3654
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Official URL: http://pubs.acs.org/doi/abs/10.1021/j100374a064
Related URL: http://dx.doi.org/10.1021/j100374a064
Abstract
Absorption and emission properties of protonated and unprotonated forms of phenosafranine dye are investigated in the perfluorosulfonate ion-exchange membrane (Nafion) and polymer solution. Only the unprotonated form of phenosafranine is photoactive and undergoes electron transfer with triethylamine upon excitation with visible light. The triplet excited state of phenosafranine and the electron-transfer products in the Nafion film are characterized by laser flash photolysis with 532-nm excitation. In a dry evacuated film the triplet lifetime of phenosafranine is greater than 1.5 ms. During the steady-state photolysis, the semireduced dye undergoes disproportionation to accumulate a colorless two-electron-reduction product.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 62061 |
| Deposited On: | 16 Sep 2011 04:06 |
| Last Modified: | 16 Sep 2011 04:06 |
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