title: Porphyrin-based switchable molecular turnstiles.
abstract: The design, synthesis and structural characterisation, in solution, of two new molecular turnstiles based on Sn-porphyrin derivatives are described. The system is composed of a stator (5-(4-pyridyl)-10,15,20-triphenylporphyrin), a hinge (Sn(IV)) and a rotor (handle equipped with 2,6-pyridinedicarboxamide as a tridentate coordinating site or its Pd(II) complex). The presence of interaction sites, both on the stator and the rotor, offers the possibility of switching between an open state (free rotation of the handle around the porphyrin) and a closed state (blockage of the rotation) by either establishment of hydrogen bonds between the stator and the rotor or by the simultaneous binding of Pd by both coordinating groups.
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, France.
authors.forename: Aurélie
authors.initials: A
authors.lastname: Guenet
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
mesh_terms: D008665:Metalloporphyrins / Q000737:chemistry*; D008968:Molecular Conformation; D010165:Palladium / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry*; D013237:Stereoisomerism; D014001:Tin / Q000737:chemistry*
chemical_list: D008665:Metalloporphyrins; D011166:Porphyrins; D010165:Palladium; D014001:Tin