title: A three-level luminescent response in a pyrene/ferrocene rotaxane.
abstract: A solvent switchable rotaxane equipped with a pyrene stopper and with two ferrocenyl units on the macrocycle is reported, in which three different states, two nondegenerate and one degenerate, can be obtained in different solvents at room temperature. This is accompanied by high contrast changes in fluorescence intensity of the pyrene stopper by the presence of the ferrocenyl moieties on the macrocycle, which quench the emission of pyrene more efficiently with proximity.
authors.affiliation: POLYMAT, University of the Basque Country UPV/EHU, Avenida de Tolosa 72, E-20018 Donostia-San Sebastian, Spain. amateo@polymat.eu
authors.forename: Aurelio
authors.initials: A
authors.lastname: Mateo-Alonso
authors.forename: Christian
authors.initials: C
authors.lastname: Ehli
authors.forename: Dirk M
authors.initials: DM
authors.lastname: Guldi
authors.forename: Maurizio
authors.initials: M
authors.lastname: Prato
mesh_terms: D005296:Ferrous Compounds / Q000737:chemistry*; D049449:Luminescence; D009682:Magnetic Resonance Spectroscopy; D000075163:Metallocenes; D011721:Pyrenes / Q000737:chemistry*; D043862:Rotaxanes / Q000138:chemical synthesis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013696:Temperature
chemical_list: D005296:Ferrous Compounds; D000075163:Metallocenes; D011721:Pyrenes; D043862:Rotaxanes; C030984:pyrene; C004998:ferrocene