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- W2026795724 abstract "Abstract 2-(2′-hydroxyphenyl) benzoxazole (HBO) can exist in two tautomeric forms, in an enol form (E) and a keto form (K). In the metastable triplet state of HBO in liquid alkanes, both tautomers have roughly the same energy, and a dual phosphorescence, 3 K * → 1 K and 3 E * → 1 E, is observed; both components of the dual phosphorescence exhibit the same monoexponential decay. In solid solution, the keto phosphorescence decays faster than the enol phosphorescence, and both decays are nonexponential. The dispersive kinetics of the dual phosphorescence from a solid solution can be described by a simple model with a minimum of parameters: The rate constants k K and k E for the decay of 3 K * and 3 E * to the respective electronic ground state and a distribution function for the energy difference between 3 K * and 3 E * in solid solution. The true distribution function seems to be better approximated by a Lorentzian than by a Gaussian. k K and k E are virtually independent of temperature." @default.
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- W2026795724 date "1994-06-01" @default.
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- W2026795724 title "Dual phosphorescence from 2-(2′-hydroxyphenyl) benzoxazole in amorphous solid solution. Temperature dependence of dispersive kinetics fo nonexponential triplet decay" @default.
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- W2026795724 doi "https://doi.org/10.1016/0301-0104(94)00068-9" @default.
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