title: One ligand in dual roles: self-assembly of a bis-rhomboidal-shaped, three-dimensional molecular wheel.
abstract: A facile high yield, self-assembly process that leads to a terpyridine-based, three-dimensional, bis-rhomboidal-shaped, molecular wheel is reported. The desired coordination-driven supramolecular wheel involves eight structurally distorted tristerpyridine (tpy) ligands possessing a 60° angle between the adjacent tpy units and twelve Zn(2+) ions. The tpy ligand plays dual roles in the self-assembly process: two are staggered at 180° to create the internal hub, while six produce the external rim. The wheel can be readily generated by mixing the tpy ligand and Zn(2+) in a stoichiometric ratio of 2:3; full characterization is provided by ESI-MS, NMR spectroscopy, and TEM imaging.
authors.affiliation: Department of Polymer Science, Department of Chemistry, The University of Akron, 302 Buchtel Common, Akron, OH 44325 (USA) http://www.dendrimers.com.
authors.forename: Xiaocun
authors.initials: X
authors.lastname: Lu
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Li
authors.forename: Kai
authors.initials: K
authors.lastname: Guo
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: Mingjun
authors.initials: M
authors.lastname: Huang
authors.forename: Jin-Liang
authors.initials: JL
authors.lastname: Wang
authors.forename: Ting-Zheng
authors.initials: TZ
authors.lastname: Xie
authors.forename: Charles N
authors.initials: CN
authors.lastname: Moorefield
authors.forename: Stephen Z D
authors.initials: SZ
authors.lastname: Cheng
authors.forename: Chrys
authors.initials: C
authors.lastname: Wesdemiotis
authors.forename: George R
authors.initials: GR
authors.lastname: Newkome
mesh_terms: D007536:Isomerism; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D056004:Molecular Dynamics Simulation; D011725:Pyridines / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D015032:Zinc / Q000737:chemistry
chemical_list: D008024:Ligands; D011725:Pyridines; D015032:Zinc
keywords: NMR spectroscopy; self-assembly; supramolecular chemistry; terpyridine; travelling-wave ion mobility