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          Institute: MPI für Polymerforschung     Collection: MPI Polymerforschung     Display Documents

ID: 28426.0, MPI für Polymerforschung / MPI Polymerforschung
Excitation energy transfer in dendritic host-guest donor- acceptor systems
Authors:Köhn, F.; Hofkens, J.; Gronheid, R.; Cotlet, M.; Müllen, Klaus; Van der Auweraer, M.; De Schryver, F. C.
Date of Publication (YYYY-MM-DD):2002-12-16
Title of Journal:ChemPhysChem
Journal Abbrev.:ChemPhysChem
Issue / Number:12
Start Page:1005
End Page:1013
Review Status:No review
Audience:Not Specified
Abstract / Description:We report on a study of a physically formed host-guest system, which was designed to be investigated by fluorescence energy transfer. All donor and acceptor molecules used were cyanine dyes. Investigation was performed at the ensemble level as well as at the single-molecule level. The ensemble measurements revealed a distribution of binding sites as well for the donor as for the acceptor. Accordingly, we found a distribution of the energy transfer efficiency. At the single-molecule level, these distributions are still present. We could discriminate entities that show very efficient energy transfer, some that do not show any energy transfer and systems whose energy transfer efficiency is only about 50%. The latter allowed the time resolved detection of energy transfer of single entities through the acceptor decay. Finally we discuss the observation that the energy transfer efficiency fluctuates as a function of time.
Free Keywords:cyanine dyes; energy transfer; fluorescence; host-guest systems; single molecule studies
Comment of the Author/Creator:Date: 2002, DEC 16
External Publication Status:published
Document Type:Article
Affiliations:MPI für Polymerforschung
External Affiliations:Katholieke Univ Leuven, Dept Chem, Lab Photochem & Spect, Celestijnenlaan 200F, B-3001 Louvain, Belgium
Identifiers:ISI:000180112300003 [ID No:1]
ISSN:1439-4235 [ID No:2]
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