title: Viologen cyclophanes: redox controlled host-guest interactions.
abstract: Viologens can exist in three redox states varying from dicationic to neutral. This work emphasizes the control of the host-guest properties in bis-viologen cyclophanes. Two flexible cyclophanes were prepared by a cyclisation method sensitive to the odd/even number of carbons in the flexible chains linking two viologens. C5 and C7 cyclophanes were characterised by X-ray diffraction in their tetracationic state and their diradical dicationic state. In the presence of tetrathiafulvalene or methyl viologen as guests, inclusion complexes were obtained, including a mixed valence species.
authors.affiliation: CLAC, Institut de Chimie de Strasbourg, UMR 7177 CNRS-Université de Strasbourg, 67000 Strasbourg, France. jweiss@unistra.fr.
authors.forename: Mathilde
authors.initials: M
authors.lastname: Berville
authors.affiliation: Service de Cristallographie, GDS 3648, CNRS-Université de Strasbourg, 1 rue Blaise Pascal, 67000 Strasbourg, France.
authors.forename: Lydia
authors.initials: L
authors.lastname: Karmazin
authors.affiliation: CLAC, Institut de Chimie de Strasbourg, UMR 7177 CNRS-Université de Strasbourg, 67000 Strasbourg, France. jweiss@unistra.fr.
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Wytko
authors.affiliation: CLAC, Institut de Chimie de Strasbourg, UMR 7177 CNRS-Université de Strasbourg, 67000 Strasbourg, France. jweiss@unistra.fr.
authors.forename: Jean
authors.initials: J
authors.lastname: Weiss