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- W2324829100 endingPage "151" @default.
- W2324829100 startingPage "144" @default.
- W2324829100 abstract "Two previously inaccessible analogs of 10-hydroxybenzo[h]quinoline were prepared via a straightforward strategy comprising the formation of π-expanded phenazines skeleton followed by C–H acetoxylation at position 10. Two bis-phenols possessing C2 and D2 symmetry were obtained in yields of 52% and 15%, respectively. The occurrence of excited state intramolecular proton transfer (ESIPT) was detected in all cases because steady state emission was observed only from the excited keto-tautomer. Additionally, a short-lived, ∼0.1 ps, emission decay was resolved by the femtosecond up-conversion technique at the blue side of the keto-tautomer emission band, 610 nm, and was attributed to the ESIPT, i.e., conversion from enol to keto tautomer. In comparison with the corresponding 10-hydroxybenzo[h]quinoline emissions, the emission spectrum of the π-expanded phenazine analogues were weaker but displayed a characteristic bathochromically shift into NIR region. These phenazine analogues constitute one of largest heterocycles for which ESIPT was unambiguously detected." @default.
- W2324829100 created "2016-06-24" @default.
- W2324829100 creator A5022830937 @default.
- W2324829100 creator A5024442454 @default.
- W2324829100 creator A5025064083 @default.
- W2324829100 creator A5063867141 @default.
- W2324829100 creator A5067196824 @default.
- W2324829100 creator A5071530703 @default.
- W2324829100 date "2013-12-26" @default.
- W2324829100 modified "2023-09-25" @default.
- W2324829100 title "Excited State Intramolecular Proton Transfer in π-Expanded Phenazine-Derived Phenols" @default.
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