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- W2155858741 abstract "In spite of the large number of experimental and theoretical studies, the optical absorption trend of the green fluorescent protein (GFP) chromophore in several environments has not been fully understood. We calculated at the same level of time dependent density functional theory the vertical excitation energy of the anionic GFP chromophore in the protein and in ethanol, dioxane, methanol and water solutions. As result, we reproduced for the first time the experimental trend of the absorption peaks with 0.015 eV as the standard deviation of the accuracy. This systematic error allowed us to analyze with confidence the relative weight of several solvation effects on the vertical excitation energy. Experimental trends not correlated with the solvent polarity were therefore explained with a fine balance of different steric and electronic effects on the photophysics of the chromophore. As an indirect and remarkable result, the present analysis confirms that the optical absorption of the chromophore in the gas phase is close to the value of 2.84 eV extrapolated by Dong et al. (J. Am. Chem. Soc., 2006, 128, 12038), and, as a consequence, that the protein environment induces a red shift of 0.23 eV." @default.
- W2155858741 created "2016-06-24" @default.
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- W2155858741 creator A5025090819 @default.
- W2155858741 creator A5030929196 @default.
- W2155858741 date "2013-01-01" @default.
- W2155858741 modified "2023-09-29" @default.
- W2155858741 title "On the optical absorption of the anionic GFP chromophore in vacuum, solution, and protein" @default.
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- W2155858741 doi "https://doi.org/10.1039/c3cp52820k" @default.
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