Intramolecular Förster energy transfer in a dendritic system at the single molecule level

Roel Gronheid; Johan Hofkens; Fabian Köhn; Tanja Weil; Erik Reuther; Klaus Müllen; Frans C De Schryver

doi:10.1021/ja017442a

Intramolecular Förster energy transfer in a dendritic system at the single molecule level

J Am Chem Soc. 2002 Mar 20;124(11):2418-9. doi: 10.1021/ja017442a.

Authors

Roel Gronheid¹, Johan Hofkens, Fabian Köhn, Tanja Weil, Erik Reuther, Klaus Müllen, Frans C De Schryver

Affiliation

¹ Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium.

PMID: 11890773
DOI: 10.1021/ja017442a

Abstract

The photophysics of a dendrimer containing four donor chromophores and one acceptor chromophore are studied at the single-molecule level. Upon excitation of the donors exclusive acceptor emission is observed due to efficient Förster energy transfer. For 70% of the molecules donor emission is observed after bleaching of the acceptor, leading to a reduction of the Förster energy transfer efficiency. Furthermore, we demonstrate that in this molecular system the donor chromophores do not bleach by a triplet-sensitized photooxidation.