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- W1986032356 abstract "The solution structure of a synthetic DNA mini-hairpin possessing a stilbenediether linker and three G:C base pairs has been obtained using (1)H NMR spectral data and constrained torsion angle molecular dynamics. Notable features of this structure include a compact hairpin loop having a short stilbene-guanine plane-to-plane distance and approximate B-DNA geometry for the three base pairs. Comparison of the electronic spectra of mini-hairpins having one-to-four G:C base pairs and stilbenediether or hexamethyleneglycol linkers reveals the presence of features in the UV and CD spectra of the stilbene-linked hairpins that are not observed for the ethyleneglycol-linked hairpins. Investigation of the electronic structure of a stilbene-linked hairpin having a single G:C base pair by means of time-dependent density functional theory shows that the highest occupied molecular orbital, but not the lowest unoccupied molecular orbital, is delocalized over the stilbene and adjacent guanine. The calculated UV and CD spectra are highly dependent upon hairpin conformation, but reproduce the major features of the experimental spectra. These results illustrate the utility of an integrated experimental and theoretical approach to understanding the complex electronic spectra of pi-stacked chromophores." @default.
- W1986032356 created "2016-06-24" @default.
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- W1986032356 date "2007-10-25" @default.
- W1986032356 modified "2023-09-23" @default.
- W1986032356 title "Structure and Electronic Spectra of DNA Mini-hairpins with G<i><sub>n</sub></i>:C<i><sub>n</sub></i> Stems" @default.
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- W1986032356 doi "https://doi.org/10.1021/jp072303m" @default.
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