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Article Abstract
A family of mono- and ditopic hydroxamic acids has been employed in the synthesis and structural and physical characterisation of discrete (0D) and (1- and 2-D) extended network coordination complexes. Examples of the latter include the 1-D coordination polymer {[Zn(ii)(LH)]·2MeOH} (5; LH = 2-(methylamino)phenylhydroxamic acid) and the 2-D extended network {[Cu(ii)(LH)(HO)(NO)]·HO} (5; LH = 4-amino-2-(acetoxy)phenylhydroxamic acid). The 12-MC-4 metallacrown [Cu(ii)(LH)(MeOH)(NO)]·3HO·4MeOH (7) represents the first metal complex constructed using the novel ligand N-hydroxy-2-[(2-hydroxy-3-methoxybenzyl)amino]benzamide (LH). Variable temperature magnetic susceptibility studies confirm strong antiferromagnetic exchange between the Cu(ii) centres in 7. Coordination polymer 5 shows photoluminescence in the blue region (λ∼ 421-450 nm) with a bathochromic shift of the emission (∼15-30 nm) from solution to the solid state.
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