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- W3176746435 abstract "Gas-phase chemistry of cation radicals related to ionized nucleic acids has enjoyed significant recent progress thanks to the development of new methods for cation radical generation, ion spectroscopy, and reactivity studies. Oxidative methods based on intramolecular electron transfer in transition-metal complexes have been used to generate nucleobase and nucleoside cation radicals. Reductive methods relying on intermolecular electron transfer in gas-phase ion–ion reactions have been utilized to generate a number of di- and tetranucleotide cation radicals, as well as charge-tagged nucleoside radicals. The generated cation radicals have been studied by infrared and UV–visible action spectroscopy and ab initio and density functional theory calculations, providing optimized structures, harmonic frequencies, and excited-state analysis. This has led to the discovery of stable noncanonical nucleobase cation radicals of unusual electronic properties and extremely low ion–electron recombination energies. Intramolecular proton-transfer reactions in cation radical oligonucleotides and Watson–Crick nucleoside pairs have been studied experimentally, and their mechanisms have been elucidated by theory. Whereas the range of applications of the oxidative methods is currently limited to nucleobases and readily oxidizable guanosine, the reductive methods can be scaled up to generate large oligonucleotide cation radicals including double-strand DNA. Challenges in the experimental and computational approach to DNA cation radicals are discussed." @default.
- W3176746435 created "2021-07-05" @default.
- W3176746435 creator A5042952795 @default.
- W3176746435 date "2021-06-24" @default.
- W3176746435 modified "2023-10-18" @default.
- W3176746435 title "Flying DNA Cation Radicals in the Gas Phase: Generation and Action Spectroscopy of Canonical and Noncanonical Nucleobase Forms" @default.
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- W3176746435 doi "https://doi.org/10.1021/acs.jpcb.1c03674" @default.
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