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- W1977299548 abstract "Abstract Quenching measurements of phosphorescence intensity and lifetime of benzophenone and its derivatives with electron-attracting substituents by arylketones with electron-releasing substituents, carried out in acetic acid, show that the quenching rate parameter k q depends on the structure of the two interacting partners. The k q value increases with the electron-donating power of the substituents in the quencher, approaching the diffusional value with the strongest electron-donating groups, whilst it decreases when electron-withdrawing substituents are present in the quenched species. The first effect is explained by an interaction mechanism where a charge transfer occurs from the quencher to the excited donor. The effect of donor structure on the k q value is ascribed to the contribution of a partial reversible energy transfer. A study of the dependence of the experimental quenching parameter on the donor concentration gives evidence for the reversible transfer process." @default.
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- W1977299548 date "1981-01-01" @default.
- W1977299548 modified "2023-09-27" @default.
- W1977299548 title "Arylketones as triplet donors and quenchers: evidence for chemical quenching and reversible energy transfer" @default.
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- W1977299548 doi "https://doi.org/10.1016/0047-2670(81)87008-6" @default.
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