KINETIC STUDIES OF SELF-SENSITIZED PHOTOOXYGENATION IN H2O AND D2O OF A WATER-SOLUBLE RUBRENE DERIVATIVE |
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| Authors: | J. M. Aubry J. Rigaudy Nguyen Kim Cuong |
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| Affiliation: | Laboratoire de Recherches Organiques de I'E.S.P.C.I., E.R.A. No. 170, 10 rue Vauquelin, F-5231 Paris Cedex 05, France |
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| Abstract: | Abstract A continuous argon laser has been used to study the self-sensitized photooxidation of potassium rubrene-2,3,8,9-tetracarboxylate in oxygen-saturated H2O and D2O. An analysis of the data obtained in concentrated solutions leads to an unexpected high value of the ratio of 1O2 lifetimes in D2O and H2O, T d 2o/T h 2o =17 ± 1. Results obtained in diluted aqueous solutions are interpreted in terms of a re-encounter of 1O2 and ground state substrate molecules generated in the same triplet—triplet annihilation act. |
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