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- W1968372224 abstract "Two electronically excited bipyridyl derivatives, [2,2'-bipyridyl]-3,3'-diol (BP(OH)2) and [2,2'-bipyridyl]-3-ol (BPOH) were compared as examples of fast proton transfer reactions. No primary fluorescence was seen in either case. Temperature effects were measured. Quantum yields of the tautomeric fluorescence at 77 K are 0.56 for BP(OH)2 and 0.047 for BPOH. In BP(OH)2 a very efficient double proton transfer (DPT) was observed, in agreement with previous findings [6]. The radiationless are constants of tautomeric BP(OH)2 is weakly temperature dependent (ΔE = 0.32 kcal/mol.). The photophysical kinetics are insensitive to OH → OD isotopic substitution. In BPOH the single proton transfer (SPT) seems also to be efficient, the decay being strongly controlles by the tentatively identified radiationless mechanism. The probable role of torsional motions in radiations depopulation of the excited for the series bipyridyl (BP)-BPOH-BP(OH)2." @default.
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- W1968372224 date "1986-07-01" @default.
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- W1968372224 title "Single and double proton transfer in excited hydroxy derivatives of bipyridyl" @default.
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- W1968372224 doi "https://doi.org/10.1016/0022-2313(86)90010-4" @default.
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