Efficient Quenching of Oligomeric Fluorophores on a DNA Backbone
2007; American Chemical Society; Volume: 129; Issue: 50 Linguagem: Inglês
10.1021/ja075968a
ISSN1943-2984
AutoresJames N. Wilson, Yin Nah Teo, Eric T. Kool,
Tópico(s)Luminescence and Fluorescent Materials
ResumoThe quenching properties of a series of oligodeoxyribosides bearing fluorophore “bases” are described. Sequences of adjacent, π-stacked pyrenes exhibit stronger electronic interactions visible in both absorbance and emission spectra than pyrenes that are insulated by intervening adenines. Quenching by N,N‘-dimethyl-4,4‘-bipyridinium dichloride is efficient for excimer- and exciplex-forming oligomers, with Stern−Volmer constants comparable to conjugated polymer “superquenching” schemes.
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