Reaction dynamics between the photonuclease triplet-excited vitamin-K3 and guanine nucleotide
Nanosecond laser pulse photolysis was used to investigate the excited-state dynamics of the photonuclease vitamin-K3 (VK3). A spectral band peaked at 285 nm was newly observed and attributed to the triplet-excited state of VK3. In studying the photochemistry between the photonuclease VK3 and guanine nucleotide (dGMP), we obtained spectroscopic evidence for the photo-initiated formation of both VK3 radical anion and dGMP radical cation, and thus proved the charge transfer reaction between the triplet-excited VK3 and the ground-state dGMP.
Keywordsvitamin-K3 triplet-state guanine nucleotide charge transfer
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