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자료유형
학술저널
저자정보
Galievsky, Victor A. (B.I. Stepanovs Institute of Physics, National Academy of Sciences of Belarus) Malinovskii, Vladimir L. (Department of Chemistry and Biochemistry, University of Bern) Stasheuski, Alexander S. (B.I. Stepanovs Institute of Physics, National Academy of Sciences of Belarus) Samain, Florent (Department of Chemistry and Biochemistry, University of Bern) Zachariasse, Klaas A. (Max-Planck-Institut fur biophysikalische Chemie, Spektroskopie und Photochemische Kinetik) Haner, Robert (Department of Chemistry and Biochemistry, University of Bern) Chirvony, Vladimir S. (B.I. Stepanovs Institute of Physics, National Academy of Sciences of Belarus)
저널정보
한국광과학회 Photochemical & photobiological sciences : an international journal Photochemical & photobiological sciences : an international journal 제8권 제10호
발행연도
2009.1
수록면
1,448 - 1,454 (7page)

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The photophysics of free pyrenedicarboxamide (Py-DCA) in solution as well as of single-stranded and double-stranded oligonucleotides (ss and ds ONs) containing 1-7 pyrene building blocks per strand were studied by steady-state and time-resolved fluorescence spectroscopy. It was found that the fluorescence quantum yield ${\Phi}F$ of free Py-DCA chromophore in solution is rather high (${\Phi}F$ = 0.44). However, after incorporation of the chromophore into a ss ON the monomeric chromophore fluorescence is quenched more than 40-fold due to electron-transfer reactions with ON bases. An increase of the number n of neighboring pyrenes in an ON results in ${\Phi}F$ growth up to 0.25 at n = 6. Starting from n = 2, all fluorescence belongs mainly to excimer formed by pyrene chromophores. Sections composed of multiple pyrenes may be considered as robust functional entities that may serve as independent modules in DNA-based, functional nano-architectures.

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