title: ROFRET: a molecular-scale fluorescent probe displaying viscosity-enhanced intramolecular Förster energy transfer.
abstract: The fluorescent probe ROFRET contains a Bodipy molecular rotor connected through a short triazole-based spacer to a fully alkylated Bodipy. Förster resonance energy transfer takes place from the rotor to the other Bodipy, and is enhanced to a limiting value as the viscosity of the solvent increases. Time-resolved spectroscopy and steady-state studies are consistent with both forward and reverse energy transfer, and delayed fluorescence.
authors.affiliation: Molecular Photonics Laboratory, School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU (UK).
authors.forename: Dan
authors.initials: D
authors.lastname: Bai
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Benniston
authors.forename: Victoria L
authors.initials: VL
authors.lastname: Whittle
authors.forename: Helge
authors.initials: H
authors.lastname: Lemmetyinen
authors.forename: Nikolai V
authors.initials: NV
authors.lastname: Tkachenko
keywords: Förster resonance; boron dipyrromethene; energy transfer; molecular devices; viscosity