Singlet oxygen luminescence as a probe of the stilbene triplet surface |
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| Affiliation: | 1. School of Chemistry and Food, Federal University of Rio Grande–FURG, Rio Grande do Sul, Brazil;2. Computer Science Center, Federal University of Rio Grande–FURG, Rio Grande do Sul, Brazil;1. School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14850, USA;2. Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14850, USA |
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| Abstract: | The quenching of stilbene triplet by oxygen in benzene produces singlet oxygen, O2(1Δg), with an efficiency of 18±5%. This value, together with the corresponding rate constant, shows that the O2(1Δg) produced cannot be the consequence of exclusive oxygen quenching of a low concentration of planar trans-triplet in rapid equilibrium with the perpendicular form. |
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