ArticleChembiochem : a European journal of chemical biology2020
UV-Induced Charge-Transfer States in Short Guanosine-Containing DNA Oligonucleotides.
Article in Chembiochem : a European journal of chemical biology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Strand Structure Controls Photoinduced Self-Repair of RNA Uracil Dimers.The journal of physical chemistry letters · 2026Article
- Factors Affecting the Population of Excited Charge Transfer States in Adenine/Guanine Dinucleotides: A Joint Computational and Transient Absorption Study.Biomolecules · 2024Article
- Real-time observation of sub-100-fs charge and energy transfer processes in DNA dinucleotides.Chemical science · 2024Article
- Photoinduced charge separation and DNA self-repair depend on sequence directionality and stacking pattern.Chemical science · 2024Article
- Sequence dependent UV damage of complete pools of oligonucleotides.Scientific reports · 2023Article
- UV-Induced Charge-Transfer States in Short Guanosine-Containing DNA Oligonucleotides.Chembiochem : a European journal of chemical biology · 2020Article
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3 authors.
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Abstract
Charge transfer has proven to be an important mechanism in DNA photochemistry. In particular, guanine (dG) plays a major role as an electron donor, but the photophysical dynamics of dG-containing charge-transfer states have not been extensively investigated so far. Here, we use UV pump (266 nm) and picosecond IR probe (∼5-7 μm) spectroscopy to study ultrafast dynamics in dG-containing short oligonucleotides as a function of sequence and length. For the pure purine oligomers, we observed lifetimes for the charge-transfer states of the order of several hundreds of picoseconds, regardless of the oligonucleotide length. In contrast, pyrimidine-containing dinucleotides d(GT) and d(GC) show much faster relaxation dynamics in the 10 to 30 ps range. In all studied nucleotides, the charge-transfer states are formed with an efficiency of the order of ∼50 %. These photophysical characteristics will lead to an improved understanding of DNA damage and repair processes.
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