title: Light-Harvesting Nanotubes Formed by Supramolecular Assembly of Aromatic Oligophosphates.
abstract: A 2,7-disubstituted phosphodiester-linked phenanthrene trimer forms tubular structures in aqueous media. Chromophores are arranged in H-aggregates. Incorporation of small quantities of pyrene results in the development of light-harvesting nanotubes in which phenanthrenes act as antenna chromophores and pyrenes as energy acceptors. Energy collection is most efficient after excitation at the phenanthrene H-band. Fluorescence quantum yields up to 23 % are reached in pyrene doped, supramolecular nanotubes.
authors.affiliation: Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland.
authors.forename: Caroline D
authors.initials: CD
authors.lastname: Bösch
authors.affiliation: Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland.
authors.forename: Simon M
authors.initials: SM
authors.lastname: Langenegger
authors.affiliation: Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland. robert.haener@dcb.unibe.ch.
authors.forename: Robert
authors.initials: R
authors.lastname: Häner
keywords: H-aggregates; energy transfer; light-harvesting antenna; nanotubes; supramolecular polymers