title: Ultrafast dynamics of Förster resonance energy transfer and photo-induced charge transfer in cationic polyfluorene/dye-labeled DNA complex.
abstract: 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.
authors: RCDAMP, Department of Physics Education and Physics, Pusan National University, Busan 609-735, Republic of Korea.
authors: Kwangseuk
authors: K
authors: Kyhm
authors: Inhong
authors: I
authors: Kim
authors: Mijeong
authors: M
authors: Kang
authors: Han Young
authors: HY
authors: Woo
mesh_terms: D002412:Cations; D004396:Coloring Agents / Q000737:chemistry*; D004247:DNA / Q000737:chemistry*; D005449:Fluorenes / Q000737:chemistry*; D031541:Fluorescence Resonance Energy Transfer; D008027:Light
chemical_list: D002412:Cations; D004396:Coloring Agents; D005449:Fluorenes; C041509:fluorene; D004247:DNA