title: Supramolecular control of spin exchange in a spin-labelled [2]rotaxane incorporating a tetrathiafulvalene unit.
abstract: The EPR properties of a novel triradical obtained by single-electron oxidation of a nitroxide-spin-labelled rotaxane containing a tetrathiafulvalene unit and cyclobis(paraquat-p-phenylene) ring is reported. Rotaxanation is proved to have a dramatic effect on through-space magnetic interactions between radical fragments. Analysis of the EPR spectra by a three-jump model, allowed us to obtain structural information on the interlocked structure.
authors.affiliation: Department of Chemistry "G. Ciamician", University of Bologna, Via S. Giacomo 11, 40126, Bologna (Italy) http://www.ciam.unibo.it/radicals.
authors.forename: Francesco
authors.initials: F
authors.lastname: Romano
authors.forename: Roberta
authors.initials: R
authors.lastname: Manoni
authors.forename: Paola
authors.initials: P
authors.lastname: Franchi
authors.forename: Elisabetta
authors.initials: E
authors.lastname: Mezzina
authors.forename: Marco
authors.initials: M
authors.lastname: Lucarini
keywords: EPR spectroscopy; exchange interactions; radical ions; rotaxanes; supramolecular chemistry