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Molecular pac-man and tacos: layered cu(ii) cages from ligands with high binding site concentrations

McDonald, Cecelia
; 
Williams, David W.
; 
Comar, Priyanka
; 
Coles, Simon J.
; 
Keene, Tony D.
; 
Pitak, Mateusz B.
; 
Brechin, Euan K.
; 
Jones, Leigh F.
Repository DOI
Publication Date
2015-01-01
Keywords
copper chalcogenide clusters, magnetic-properties, crystal-structure, complexes, aggregate, solvent, transformation, phase, core
Type
Article
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Citation
McDonald, Cecelia; Williams, David W. Comar, Priyanka; Coles, Simon J.; Keene, Tony D.; Pitak, Mateusz B.; Brechin, Euan K.; Jones, Leigh F. (2015). Molecular pac-man and tacos: layered cu(ii) cages from ligands with high binding site concentrations. Dalton Trans. 44 (29), 13359-13368
Abstract
The in situ formation and subsequent Cu(II) ligation of the polydentate pro-ligands o-[(E)-(2-hydroxy3- methoxyphenyl) methylideneamino] benzohydroxamic acid (L1H3), o-[(E)-(2-hydroxy-3-methoxy-5-bromophenyl) methylideneamino] benzohydroxamic acid (L2H3) and o-[(E)-(2-hydroxyphenyl) methylideneamino] benzohydroxamic acid (L3H3), leads to the self-assembly of the cages [Cu(II)(10)(L-1)(4)(2-aph)(2)(H2O)(2)](ClO4)(4)center dot 5MeOH (1), [Cu(II)(14)(L-1)(8)(MeOH)(2.5)(H2O)(7.5)](NO3)(4)center dot 3MeOH center dot 7H(2)O (2), [Cu(II)(14)(L-2)(8)(MeOH)(4)(H2O)(6)](NO3)(4)center dot 6H(2)O (3), [Cu(II)(14)(L-3)(8)(MeOH)(6)(H2O)(2)](NO3)(4)center dot 4MeOH center dot 8H(2)O (4) and [Cu(II)(30)O(OH)(4)(OMe)(2)(L-1)(16)(MeOH)4(H2O)(2)](ClO4)(4)center dot 2MeOH center dot 30H(2)O (5). Each member comprises a highly unusual topology derived from off-set, stacked, near planar layers of polynuclear subunits connected through long Cu(II)-O contacts. The exact topology observed is dependent on the specific reaction conditions and methodologies employed. Dc magnetic susceptibility studies on 1, 2, 4 and 5 reveals strong antiferromagnetic exchange between the Cu(II) centres in all siblings. We also present the 1D coordination polymer {[Cu(II)(L-4)]center dot H2O}(n) (6) comprising the pseudo macrocyclic ligand [[2-[(E)-(2-hydroxy-3-methoxyphenyl) methyleneamino] benzoyl] amino] ethanimidate (L4H2), which is formed upon the incorporation of an MeCN unit at the hydroxamate group of precursor ligand L1H3.
Funder
Publisher
Royal Society of Chemistry (RSC)
Publisher DOI
10.1039/c5dt01463h
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Attribution-NonCommercial-NoDerivs 3.0 Ireland
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Externally hosted open access publications with University of Galway authors (2)