http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Photophysical characterization of oligopyrene modules for DNA-based nanosystems
Galievsky, Victor A.,Malinovskii, Vladimir L.,Stasheuski, Alexander S.,Samain, Florent,Zachariasse, Klaas A.,Haner, Robert,Chirvony, Vladimir S. Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.10
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.