engleski

Using small ditopic molecules and metal chelates as building blocks to construct extended metal-containing supramolecular solid-state architectures

β -Diketonate ligands (i.e. acetylacetone, α -benzylacetylacetone and dibenzoylmethane) were used to prepare coordinatively unsaturated MII-betadiketonate complexes (where MII = CuII, NiII, CoII). It has been previously shown that this class of compounds exhibit the intriguing ability to act as hosts for both small and bulky molecules (e.q. solvent molecules and fullerenes) [1]. In addition, metal(II)-betadiketonates were recently recognized as building blocks for 1D hydrogen-bonded coordination polymers [2]. In particular, β -diketones were used as chelating ligands for CuII, CoII and NiII to direct their self-assembly process with ditopic molecular linkers towards the formation of 1D polymers. In this contribution the design, synthesis and structural analysis of 2D hydrogen-bonded structures based on infinite 1D coordination polymers, which are composed of metal(II)-betadiketonates (where MII = CuII, NiII, CoII) and small polyfunctional ligands such as hexamethylenetetramine, pyrazine, 4, 4'-bipyridine, nicotinamide and pyridine will be described. Specifically, it will be shown how an appropriate polyfunctional ligand can orchestrate the self-assembly process of 1D coordination polymers into 2D hydrogen-bonded networks. The structural analysis was performed via single-crystal X-ray diffraction. The research is supported by Ministry of Science, Education and Sport of the Republic of Croatia (grant No. 119-1193079-1084). 1) D. V. Soldatov, J. Chem. Cryst. 36 (2006) 747-768. 2) C. B. Aakeröy, N. Schultheiss & J. Desper, Inorg. Chem. 44 (2005) 4983– 4991.

building blocks; self-assembly; small polyfunctional ligands

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