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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/50363


    Title: A novel dinuclear double-stranded helical complexes of bis(terdentate) N4O2 donor ligand with silver(I) and zinc(II) d10 metal ions
    Authors: Şengül, Abdurrahman;王文竹;Wang, Wen-jwu;Coles, Simon J
    Contributors: 淡江大學化學學系
    Keywords: Self-assembly;Supramolecular chemistry;Helical structures;Silver;Zinc;N,O-ligands
    Date: 2009
    Issue Date: 2010-08-09 15:52:30 (UTC+8)
    Publisher: Elsevier
    Abstract: Reaction of the hexadentate N4O2-donor ligand 6,6′-bis(3-hydrazonobutan-2-one)-2,2′-bipyridine (L) with Ag(I) and Zn(II) affords a dinuclear double stranded helicate species [Ag2L2]2+ (1a) and [Zn2L2]2+ (1b), in which partitioning of the ligand into two bis-tridentate pyridyl-ketoimine chelating units allow each ligand to bridge both metal centres. X-ray crystallography, ESI-MS and UV–Vis spectrophotometric titration experiments reveal that the complex (1a) retains its solid-state structure in solution. The crystal structure of (1a) provides the first example of dinuclear silver(I) complex in which both of the metal centres can be approximated as a seven coordinate distorted mono-capped trigonal prism in which the AgAg close contact of 3.034(4) Å is taken into account and forms the cap. The counter-ions do not interact with metal centres but hydrogen bond to N–H protons of the hydrazonic arms from the separate strands. The adjacent helical units are cross-linked together via NHOketo hydrogen bonding to maintain the supramolecular structure.
    Relation: Polyhedron 28(1), pp.69-76
    DOI: 10.1016/j.poly.2008.10.011
    Appears in Collections:[Graduate Institute & Department of Chemistry] Journal Article

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