title: Toward the self-assembly of metal-organic nanotubes using metal-metal and π-stacking interactions: bis(pyridylethynyl) silver(I) metallo-macrocycles and coordination polymers.
abstract: Shape-persistent macrocycles and planar organometallic complexes are beginning to show considerable promise as building blocks for the self-assembly of a variety of supramolecular materials including nanofibers, nanowires, and liquid crystals. Here we report the synthesis and characterization of a family of planar di- and tri-silver(I) containing metallo-macrocycles designed to self-assemble into novel metal-organic nanotubes through a combination of π-stacking and metal-metal interactions. The silver(I) complexes have been fully characterized by elemental analysis, high resolution electrospray ionization mass spectrometry (HR-ESI-MS), IR, (1)H and (13)C NMR spectroscopy, and the solution data are consistent with the formation of the metallo-macrocycles. Four of the complexes have been structurally characterized using X-ray crystallography. However, only the di-silver(I) complex formed with 1,3-bis(pyridin-3-ylethynyl)benzene is found to maintain its macrocyclic structure in the solid state. The di-silver(I) shape-persistent macrocycle assembles into a nanoporous chicken-wire like structure, and ClO(4)(-) anions and disordered H(2)O molecules fill the pores. The silver(I) complexes of 2,6-bis(pyridin-3-ylethynyl)pyridine and 1,4-di(3-pyridyl)buta-1,3-diyne ring-open and crystallize as non-porous coordination polymers.
authors.affiliation: Department of Chemistry, University of Otago, Dunedin, New Zealand.
authors.forename: Kelly J
authors.initials: KJ
authors.lastname: Kilpin
authors.forename: Martin L
authors.initials: ML
authors.lastname: Gower
authors.forename: Shane G
authors.initials: SG
authors.lastname: Telfer
authors.forename: Geoffrey B
authors.initials: GB
authors.lastname: Jameson
authors.forename: James D
authors.initials: JD
authors.lastname: Crowley