The excited states of Π-stacked 9-methyladenine oligomers: A TD-DFT study in aqueous solution
Physical Chemistry Chemical Physics, ISSN: 1463-9076, Vol: 10, Issue: 19, Page: 2656-2664
2008
- 83Citations
- 34Captures
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Metrics Details
- Citations83
- Citation Indexes83
- CrossRef83
- 83
- Captures34
- Readers34
- 34
Article Description
An extensive PCM/TD-DFT study of the excited states of Π-stacked 9-methyladenine oligomers (from the dimer up to the pentamer), adopting the B-DNA conformation, is reported. Linear response PCM/TD-PBE0 calculations provide a reliable description of the stacking effect on the bright excited states but PBE0, when compared to CAM-B3LYP, LC-ωPBE and M052X functionals, overestimates the stability of the electronic states with inter-monomer charge transfer (CT) character. On the other hand, state specific PCM/TD-DFT calculations confirm that the lowest energy excited state of the dimer corresponds to a dark excimer produced by inter-monomer CT between two stacked bases. Confirming the experimental indications, the spectroscopic states of the oligomers are delocalized over multiple bases. © 2008 the Owner Societies.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84961978276&origin=inward; http://dx.doi.org/10.1039/b718562f; http://www.ncbi.nlm.nih.gov/pubmed/18464980; https://xlink.rsc.org/?DOI=b718562f; https://dx.doi.org/10.1039/b718562f; https://pubs.rsc.org/en/content/articlelanding/2008/cp/b718562f
Royal Society of Chemistry (RSC)
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