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- W4298088101 endingPage "2192" @default.
- W4298088101 startingPage "2179" @default.
- W4298088101 abstract "The phenomenon of photoacidity, i.e., an increase in acidity by several orders of magnitude upon electronic excitation, is frequently encountered in aromatic alcohols capable of transferring a proton to a suitable acceptor. A promising new class of neutral super-photoacids based on pyranine derivatives has been shown to exhibit pronounced solvatochromic effects. To disclose the underlying mechanisms contributing to excited-state proton transfer (ESPT) and the temporal characteristics of solvation and ESPT, we scrutinize the associated ultrafast dynamics of the strongest photoacid of this class, namely tris(1,1,1,3,3,3-hexafluoropropan-2-yl)8-hydroxypyrene-1,3,6-trisulfonate, in acetoneous environment, thereby finding experimental evidence for ESPT even under these adverse conditions for proton transfer. Juxtaposing results from time-correlated single-photon counting and femtosecond transient absorption measurements combined with a complete decomposition of all signal components, i.e., absorption of ground and excited states as well as stimulated emission, we disclose dynamics of solvation, rotational diffusion, and radiative relaxation processes in acetone and identify the relevant steps of ESPT along with the associated time scales." @default.
- W4298088101 created "2022-10-01" @default.
- W4298088101 creator A5018762831 @default.
- W4298088101 creator A5035700677 @default.
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- W4298088101 creator A5051285158 @default.
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- W4298088101 creator A5070478121 @default.
- W4298088101 creator A5077589325 @default.
- W4298088101 creator A5079321872 @default.
- W4298088101 date "2022-09-30" @default.
- W4298088101 modified "2023-10-14" @default.
- W4298088101 title "Ultrafast transient absorption and solvation of a super-photoacid in acetoneous environments" @default.
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