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- W2575000055 abstract "Ultrafast energy dissipation is a crucial factor for the photostability of DNA and RNA, but even some of the key electronic deactivation pathways in monomeric nucleic acid building stones are still controversial. Here, we report on the excited-state dynamics of the rare nucleotide xanthosine monophosphate as a function of deprotonation state (XMP vs. XMP − ) and excitation wavelength ( λ pump = 278–243 nm) by femtosecond time-resolved fluorescence and absorption spectroscopy. We show that the predominating relaxation channel leads to a return of the photo-excited molecules to the electronic ground state in τ∼1 ps. The mechanism likely involves an out-of-plane deformation of the five-membered ring, different from the main electronic deactivation pathways in the canonical purine bases adenine and guanine. The results are discussed in terms of the structural and electronic differences of XMP compared to the canonical nucleotides." @default.
- W2575000055 created "2017-01-26" @default.
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- W2575000055 date "2017-01-18" @default.
- W2575000055 modified "2023-09-25" @default.
- W2575000055 title "Ultrafast Electronic Deactivation Dynamics of Xanthosine Monophosphate" @default.
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- W2575000055 doi "https://doi.org/10.3390/molecules22010160" @default.
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