title: Porphyrin-Polyyne [3]- and [5]Rotaxanes.
abstract: Porphyrin-polyyne [3]- and [5]rotaxanes have been synthesized by condensing aldehyde-rotaxanes with pyrrole or dipyrromethane. The crystal structure of a [3]rotaxane shows that the macrocycles adopt compact conformations, holding the hexaynes near the porphyrin core, and that the phenanthroline units form intermolecular π-stacked dimers in the solid. Fluorescence spectra reveal singlet excited-state energy transfer from the threaded hexayne to the porphyrin, from the phenanthroline to the porphyrin, and from the phenanthroline to the hexayne.
authors.affiliation: University of Oxford , Department of Chemistry, Chemistry Research Laboratory, Oxford OX1 3TA, United Kingdom.
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Kohn
authors.affiliation: University of Oxford , Department of Chemistry, Chemistry Research Laboratory, Oxford OX1 3TA, United Kingdom.
authors.forename: Levon D
authors.initials: LD
authors.lastname: Movsisyan
authors.affiliation: University of Oxford , Department of Chemistry, Chemistry Research Laboratory, Oxford OX1 3TA, United Kingdom.
authors.forename: Amber L
authors.initials: AL
authors.lastname: Thompson
authors.affiliation: University of Oxford , Department of Chemistry, Chemistry Research Laboratory, Oxford OX1 3TA, United Kingdom.
authors.forename: Harry L
authors.identifier: 0000-0002-1801-8132
authors.initials: HL
authors.lastname: Anderson