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Issue 34, 2013
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Progressive decoration of pentanuclear Cu(II) 12-metallacrown-4 nodes towards targeted 1- and 2D extended networks

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Abstract

The synthesis, structures and magnetic characterisation of a family of discrete planar pentanuclear Cu(II) 12-MC-4 metallacrowns of formulae [Cu5(L1)4(MeOH)4](ClO4)2 (1), [Cu5(L1)4(py)2](ClO4)2·py (2), [Cu5(L1)4(py)6](ClO4)2 (3) and [Cu5(L2)4(MeOH)4](ClO4)2·H2O (7) (where L1H2 = 2-(dimethylamino)phenylhydroxamic acid and L2H2 = 2-(amino)phenylhydroxamic acid) are reported. UV-vis and Electrospray MS studies indicate solution stability with respect to their {Cu5(L)4}2+ cores. Magnetic susceptibility measurements confirm strong antiferromagnetic exchange between the Cu(II) ions resulting in isolated S = 1/2 ground spin states. The introduction of ditopic co-ligands such as 4,4′-bipyridine (4,4′-bipy), pyrazine (pz) and 4,4′-azopyridine (4,4′-azp) results in their coordination at a number of axial Cu(II) sites within the {Cu5} metallacrown nodes to afford the extended networks {[Cu5(L1)4(4,4′-bipy)3](ClO4)2·(H2O)}n (4), {[Cu5(L1)4(4,4′-azp)2(MeOH)2](ClO4)2}n (5) and {[Cu5(L2)4(pz)2(MeOH)3](ClO4)2·MeOH}n (6).

Graphical abstract: Progressive decoration of pentanuclear Cu(ii) 12-metallacrown-4 nodes towards targeted 1- and 2D extended networks

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Publication details

The article was received on 15 May 2013, accepted on 05 Jul 2013 and first published on 05 Jul 2013


Article type: Paper
DOI: 10.1039/C3CE40859K
Citation: CrystEngComm, 2013,15, 6672-6681
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    Progressive decoration of pentanuclear Cu(II) 12-metallacrown-4 nodes towards targeted 1- and 2D extended networks

    C. McDonald, T. Whyte, S. M. Taylor, S. Sanz, E. K. Brechin, D. Gaynor and L. F. Jones, CrystEngComm, 2013, 15, 6672
    DOI: 10.1039/C3CE40859K

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