The fate of oxygen in the quenching of excited singlet states |
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| Authors: | P.B. Merkel W.G. Herkstroeter |
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| Affiliation: | Research Laboratories, Eastman Kodak Company, Rochester, New York 14650, USA |
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| Abstract: | Measurement of the efficiency of rubrene-sensitizied photooxidation of 1,3-diphenylisobenzofuran imply that direct formation of singlet oxygen via oxygen quenching of excited rubrene singlets is inefficient. This contrasts with recent publications based upon studies of self-sensitized rubrene photooxidation. The observed inefficiency can be rationalized in terms of the spin-allowed decay of an initially formed 3(T1 + 1Δ) complex state to a lower energy 3(T1 + 3Σ) state prior to complex dissociation. |
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