Supramolecular circular helicates formed by destabilisation of supramolecular dimers

Jacqueline Hamblin, Floriana Tuna, Siona Bunce, Laura J. Childs, Alexander Jackson, William Errington, Nathaniel W. Alcock, Helene Nierengarten, Alain Van Dorsselaer, Emmanuelle Leize-Wagner, Michael J. Hannon

    Research output: Contribution to journalArticlepeer-review


    The effect of changes in the angles at the connection points of linear/circular helicates is explored as a route to control the nuclearity and architecture of metallo-supramolecular arrays. This effect is probed by changing the geometry of the metal centre used to assemble bis-pyridylimine ligands that contain a l,3-bis(aminomethyl) benzene spacer group. Tetrahedral metal ions favour linear dimers. whereas octahedral nickel(II) predominantly gives a triangular circular helicate. Five-coordinate copper(II) falls in the middle of these extremes and results in the formation of solvent-dependent mixtures of dimer and trimer. The trinuclear, triangular, circular helicate structures, which result from coordination to copper(II) and nickel(II), are structurally characterised by X-ray crystallography and reveal that the units can aggregate into hexagonal arrays that contain anion-filled tubelike channels in the solid state. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA.
    Original languageEnglish
    Pages (from-to)9286-9296
    Number of pages10
    JournalChemistry - A European Journal
    Issue number33
    Publication statusPublished - 2007


    • Circular helicates
    • Dinuclear double helicates
    • N ligands
    • Pyridylimine ligands
    • Supramolecular chemistry


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