Jump to main content
Jump to site search

Issue 10, 2009
Previous Article Next Article

Photophysical characterization of oligopyrene modules for DNA-based nanosystems

Author affiliations

Abstract

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 ΦF of free Py-DCA chromophore in solution is rather high (ΦF = 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 ΦF 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.

Graphical abstract: Photophysical characterization of oligopyrene modules for DNA-based nanosystems

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Jun 2009, accepted on 13 Jul 2009 and first published on 07 Aug 2009


Article type: Paper
DOI: 10.1039/B9PP00016J
Photochem. Photobiol. Sci., 2009,8, 1448-1454

  •   Request permissions

    Photophysical characterization of oligopyrene modules for DNA-based nanosystems

    V. A. Galievsky, V. L. Malinovskii, A. S. Stasheuski, F. Samain, K. A. Zachariasse, R. Häner and V. S. Chirvony, Photochem. Photobiol. Sci., 2009, 8, 1448
    DOI: 10.1039/B9PP00016J

Search articles by author

Spotlight

Advertisements