Ultrafast dynamics of Förster resonance energy transfer and photo-induced charge transfer in cationic polyfluorene/dye-labeled DNA complex

Ultrafast dynamics of Förster resonance energy transfer and photo-induced charge transfer in cationic polyfluorene/dye-labeled DNA complex

The ultrafast dynamics of Förster resonance energy transfer (FRET) and photo-induced charge transfer (PCT) has been investigated in an electrostatic complex of a fluorescein-labeled single-stranded DNA (as a FRET acceptor) and a cationic polyfluorene copolymer (as a FRET donor). The donor-acceptor i...

Full description

Saved in:
Bibliographic Details
Published in:Journal of nanoscience and nanotechnology Vol. 12; no. 10; p. 7733
Main Authors: Kyhm, Kwangseuk, Kim, Inhong, Kang, Mijeong, Woo, Han Young
Format: Journal Article
Language:English
Published: United States 01-10-2012
Subjects:
Cations
Coloring Agents - chemistry
DNA - chemistry
Fluorenes - chemistry
Fluorescence Resonance Energy Transfer
Light
Online Access:Get more information
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The ultrafast dynamics of Förster resonance energy transfer (FRET) and photo-induced charge transfer (PCT) has been investigated in an electrostatic complex of a fluorescein-labeled single-stranded DNA (as a FRET acceptor) and a cationic polyfluorene copolymer (as a FRET donor). The donor-acceptor intermolecular distance and total energy transfer efficiency are determined for a polymer/DNA complex with two different counter-ions and compared with those obtained using a theoretical model by considering the competition between FRET and PCT processes. The maximum total energy transfer efficiency (0.47) was estimated at the optimum donor-acceptor intermolecular distance of 39.6 A.
ISSN:1533-4880
DOI:10.1166/jnn.2012.6633