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• W4211021803 endingPage "1075" @default.
• W4211021803 startingPage "1062" @default.
• W4211021803 abstract "This paper is the second part of a study on the effects of a substituted 5'-phenylenevinylene (PV) functionality on the emission properties of 2-(2'-hydroxyphenyl)benzoxazole (HBO)─a dye that is known for excited-state intramolecular proton transfer. The topical compounds are referred to as PVHBOs, each of which is a structural fusion of HBO and a 4-hydroxy-4'-R-stilbene fluorophore that occurs at the hydroxyphenyl moiety. Therefore, the resulting fusion fluorophore manifests the properties of one component or the other, as governed by its interactions with the environment. In part I (the preceding paper), PVHBOs are divided into two groups depending on whether the R substituent is electron-donating/neutral (group I) or electron-withdrawing (group II). The difference in absorption and emission properties between groups I and II is explained based on observations from spectroscopic experiments (both steady-state and time-resolved) and quantum chemical calculations. In the current paper, the same set of tools is applied to characterize the photophysical properties of the conjugate bases─that is, the anions─of PVHBOs. The emission energy of the anion of any group I compound, where the R substituent is either electron-donating or neutral, is situated between those of the neutral enol and keto forms. The emission of the anion of any given group II compound, on the other hand, has a lower energy than both the enol and keto emissions. The frontier molecular orbitals (i.e., HOMO, LUMO, and LUMO + 1) of a PVHBO localized on either HBO or stilbenoid are impacted by the substituent R and the solvent/additive differently, which leads to the differences in the optical properties of group I and II PVHBOs in both neutral and anion forms." @default.
• W4211021803 created "2022-02-13" @default.
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• W4211021803 date "2022-02-10" @default.
• W4211021803 modified "2023-10-10" @default.
• W4211021803 title "Triple Emission of 5′-(<i>para</i>-R-Phenylene)vinylene-2-(2′-hydroxyphenyl)benzoxazole (<b>PVHBO</b>). Part II: Emission from Anions" @default.
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• W4211021803 doi "https://doi.org/10.1021/acs.jpca.1c10167" @default.
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