title: Molecular rotors: design, synthesis, structural analysis, and silver complex of new [7.7]cyclophanes.
abstract: New molecular rotors, [7.7](2,6)pyridinocyclophanes (monomers and dimers) embedding 1,3-dioxanes in the bridges, were investigated by variable-temperature NMR, molecular modeling, and single-crystal X-ray diffractometry. The nitrogen-inside rotation of the pyridine ring is more hindered in the derivatives with longer distance between the bridges (i.e., para > meta and 2,6-pyridylene > ortho) and can be chemically stopped by complexation with CF(3)SO(3)Ag. [structure: see text]
authors.affiliation: Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, 11 Arany Janos str., 400028 Cluj-Napoca, Romania.
authors.forename: Niculina
authors.initials: N
authors.lastname: Bogdan
authors.forename: Ion
authors.initials: I
authors.lastname: Grosu
authors.forename: Guillaume
authors.initials: G
authors.lastname: Benoît
authors.forename: Loïc
authors.initials: L
authors.lastname: Toupet
authors.forename: Yvan
authors.initials: Y
authors.lastname: Ramondenc
authors.forename: Eric
authors.initials: E
authors.lastname: Condamine
authors.forename: Ioan
authors.initials: I
authors.lastname: Silaghi-Dumitrescu
authors.forename: Gérard
authors.initials: G
authors.lastname: Plé