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- W2980888575 abstract "Isoalloxazine is the core chromophore present in the cofactor of flavoproteins. Naturally, flavin usually exists in five different redox forms in protein milieu by accepting up to 2-electrons and 2-protons. The redox state has a strong impact on its photophysical properties. Fully oxidized and anionic radical isoalloxazine absorb blue light, neutral semi-quinone form absorbs green/red light and fully reduced forms absorb UV light. In the excited state, isoalloxazine becomes a strong oxidizer and acidic upon reduction. Understanding the relation between the redox form and its photophysical properties is fundamental to understand the biochemistry of flavoproteins. Here, we compare the effect of the redox state of isoalloxazine and some derivates on the UV-visible spectra, the redox potentials, acidity constants and electron affinities by means of electronic structure simulations. We show that the physical properties are directly related to a transformation of a α-diimine bond to a ethene-1,2-diamine bond upon reduction." @default.
- W2980888575 created "2019-10-25" @default.
- W2980888575 creator A5001980725 @default.
- W2980888575 creator A5021653412 @default.
- W2980888575 creator A5090378026 @default.
- W2980888575 date "2020-01-01" @default.
- W2980888575 modified "2023-10-17" @default.
- W2980888575 title "Impact of the redox state of flavin chromophores on the UV–vis spectra, redox and acidity constants and electron affinities" @default.
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- W2980888575 doi "https://doi.org/10.1016/j.jphotochem.2019.112164" @default.
- W2980888575 hasPublicationYear "2020" @default.
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