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- W2895903276 abstract "Abstract On the basis of the density functional theory (DFT) and time‐dependent DFT (TDDFT) methods, we theoretically study the excited‐state intramolecular proton transfer (ESIPT) mechanism of 2,4‐bis(benzooxazol‐2′‐yl)hydroquinone (2,4‐DHBO), which is reported in the previous literature (Ulrich et al. New J. Chem . 2016, 40, 5877). The calculated absorption and fluorescence spectra of 2,4‐DHBO are accordant with previous experiment, which indicates that the selective theoretical method is credible. The comparisons of the calculated bond lengths, angles, infrared, and Raman vibrational spectra of 2,4‐DHBO manifest that two intramolecular hydrogen bonds (HBs) strengthen in the excited state (S 1 ), which should be triggered the ESIPT reaction. In addition, the calculated frontier molecular orbitals (MOs) and the map of the electron density difference between the ground (S 0 ) and S 1 states provide that the ESIPT reactions are facilitated by charge transfer after photoexcitation. Moreover, to explore the detailed ESIPT mechanism of 2,4‐DHBO, the potential energy surfaces (PESs) in the S 0 and S 1 states are constructed. Because of the low excited‐state potential barriers on the PESs of 2,4‐DHBO, the single and stepwise double ESIPT mechanisms are revealed in the S 1 state, which is different from single ESIPT mechanism proposed by experiment. We hope the detailed ESIPT mechanism of this fluorophore based on my theoretical research will help researchers to design such kinds of fluorophores in the future." @default.
- W2895903276 created "2018-10-26" @default.
- W2895903276 creator A5003317644 @default.
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- W2895903276 date "2018-10-14" @default.
- W2895903276 modified "2023-10-17" @default.
- W2895903276 title "The theoretical study about the ESIPT mechanism for 2,4-bis(benzooxazol-2′-yl)hydroquinone: Single or double?" @default.
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- W2895903276 doi "https://doi.org/10.1002/poc.3903" @default.
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