title: Open and closed states of a porphyrin based molecular turnstile.
abstract: The molecular turnstile 1 composed of a stator based on an Sn(IV)-porphyrin bearing two sets of monodentate coordinating sites (pyridyl and benzonitrile) and a handle bearing a 2,6-pyridinediamide moiety as a tridentate unit was synthesised. In the absence of metal behaving as a blocking agent, the handle freely rotates around the stator (open state). In the presence of Pd(II), the closed state of the turnstile 1-Pd resulting from the simultaneous binding of the metal centre by both the dianionic tridentate site and one of the two pyridyl units is generated. The reaction of 1-Pd with the organometallic 2,6-diphenylpyridine Pt(II) complex 11 leads to the heterotrinuclear (Pt, Sn, Pd) species 13, resulting from the binding of the platinum complex by 1-Pd.
authors.affiliation: Laboratoire de Chimie de Coordination Organique (UMR-UDS-CNRS 7140), Université de Strasbourg, Institut Le Bel, 4 rue Blaise Pascal, CS 90032, 67081, Strasbourg Cedex, France.
authors.forename: Thomas
authors.initials: T
authors.lastname: Lang
authors.forename: Ernest
authors.initials: E
authors.lastname: Graf
authors.forename: Nathalie
authors.initials: N
authors.lastname: Kyritsakas
authors.forename: Mir Wais
authors.initials: MW
authors.lastname: Hosseini