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- W3208229692 abstract "Photoinduced double-bond isomerisation of the chromophore of photoactive yellow protein (PYP) is highly sensitive to chromophore-protein interactions. On the basis of high-level ab initio calculations, using the XMCQDPT2 method, we scrutinise the effect of the chromophore-protein hydrogen bonds on the photophysical and photochemical properties of the chromophore. We identify four resonance structures – two closed-shell and two biradicaloid – that elucidate the electronic structure of the ground and first excited states involved in the isomerisation process. Changing the relative energies of the resonance structures by hydrogen-bonding interactions tunes all photochemical properties of the chromophore in an interdependent manner. Our study sheds new light on the role of the chromophore electronic structure in tuning in photosensors and fluorescent proteins." @default.
- W3208229692 created "2021-11-08" @default.
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- W3208229692 date "2020-02-19" @default.
- W3208229692 modified "2023-09-27" @default.
- W3208229692 title "Four Resonance Structures Elucidate Double-Bond Isomerisation of a Biological Chromophore" @default.
- W3208229692 doi "https://doi.org/10.26434/chemrxiv.11861580.v1" @default.
- W3208229692 hasPublicationYear "2020" @default.
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