title: Probing cucurbituril assemblies in water with TEMPO-like nitroxides: a trinitroxide supraradical with spin-spin interactions.
abstract: Nitroxide free radicals are demonstrated to be useful guests for probing cucurbit[n]uril (CB[n]) assemblies in water by EPR spectroscopy. CB[7] and CB[8] significantly aggregate either in solution or in the solid state (as evidenced by a single-crystal X-ray structure in which CB[8] forms supramolecular triangles with 4-methoxy-TEMPO). The included nitroxides show a striking resistance to biologically relevant reduction, benefiting from the carcerand effect of CB[7] and CB[8] solutions.
authors.affiliation: Laboratoire LCP, Universités d'Aix-Marseille I, II, III et CNRS, Avenue Escadrille Normandie-Niemen, 13 397 Marseille Cedex 20, France.
authors.forename: David
authors.initials: D
authors.lastname: Bardelang
authors.forename: Karol
authors.initials: K
authors.lastname: Banaszak
authors.forename: Hakim
authors.initials: H
authors.lastname: Karoui
authors.forename: Antal
authors.initials: A
authors.lastname: Rockenbauer
authors.forename: Mélanie
authors.initials: M
authors.lastname: Waite
authors.forename: Konstantin
authors.initials: K
authors.lastname: Udachin
authors.forename: John A
authors.initials: JA
authors.lastname: Ripmeester
authors.forename: Christopher I
authors.initials: CI
authors.lastname: Ratcliffe
authors.forename: Olivier
authors.initials: O
authors.lastname: Ouari
authors.forename: Paul
authors.initials: P
authors.lastname: Tordo