Electronic excitation energy transport in a DNA-Ag cluster complex

3rd International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures (Saint Petersburg OPEN 2016)

Reveguk, Z.^1 ; Ikonnikov, E.^1 ; Kononov, A.^1

Department of Molecular Biophysics and Polymer Physics, St. Petersburg State University, St. Petersburg, Russia^1

关键词: Ag clusters;    DNA duplexes;    Electronic excitation;    Electronic excitation energy;    Fluorescence decays;    Forster mechanism;    Nucleobases;    Steady state fluorescences;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/741/1/012051/pdf
DOI  :  10.1088/1742-6596/741/1/012051

来源: IOP

【 摘 要 】

We study electronic excitation transfer in the complexes of Ag clusters with oligonucleotides. Steady-state fluorescence excitation spectra show that the excitation energy is transferred to Ag cluster from all the 30 nucleobases of a 15-mer DNA duplex. This is in contrast to DNA-dyes complexes, where the energy transfer to the dye occurs from neighboring DNA bases only. Fluorescence decay curve for the DNA duplex shows that the process of energy transfer occurs within