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- W1971496075 abstract "The ground- and excited-state acidities of 3- and 4-hydroxystilbene have been investigated in aqueous solution. Approximate pKa* values determined from the Förster equation are similar for the two isomers; however, 3-hydroxystilbene behaves as a photoacid in water, whereas 4-hydroxystilbene does not. Singular value decomposition with self-modeling is used to obtain more accurate pKa* values for 3-hydroxystilbene. The different behavior of the isomeric hydroxystilbenes is attributed to differences in their excited-state C=C torsional barriers. 3-Hydroxystilbene has a high barrier and a long singlet lifetime, permitting proton transfer to compete with other singlet decay pathways, whereas 4-hydroxystilbene has a low barrier, and thus proton transfer cannot compete with C=C torsion." @default.
- W1971496075 created "2016-06-24" @default.
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- W1971496075 date "2003-03-14" @default.
- W1971496075 modified "2023-10-17" @default.
- W1971496075 title "Hydroxystilbene Isomer-Specific Photoisomerization versus Proton Transfer" @default.
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- W1971496075 doi "https://doi.org/10.1021/ja029873e" @default.
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