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Issue 1, 2011
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Lanthanide-based 0D and 2D molecular assemblies with the pyridazine-3,6-dicarboxylate linker

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Abstract

Two distinct series of lanthanides-based coordination polymers involving the pyridazine-3,6-dicarboxylate (pzdc) ligand have been structurally characterized by means of single-crystal XRD analysis. The structure of the compounds Ln2(H2O)4(pzdc)3·(3/3.5)H2O with Ln = Pr (1), Nd (2), Sm (3), Eu (4) is built up from dinuclear bricks [Ln2O8N5(H2O)4] containing two μ3-oxo bridged nine-fold coordinated lanthanide cations, connected via the pzdc ligand, which acts as tetratendate, tridentate or monodentate linkers. It results in the generation of layers of mixed pzdc-Ln2O8N5(H2O)4 networks, intercalated by free water molecules. The second series with chemical formula Ln2(H2O)6(pzdc)3·3H2O (Ln = Gd (5), Tb (6), Dy (7), Er (8), Lu (9)) is a molecular assembly of discrete dinuclear bricks similar to those of the previous compounds. They only differ by the number of terminal water molecules within the dimer [Ln2O6N5(H2O)6]. Interactions viahydrogen bond occur between terminal water species attached the lanthanide and free intercalated water molecules. Europium- and terbium-based compounds 4 and 6 exhibit fluorescence emission in the visible region at room temperature.

Graphical abstract: Lanthanide-based 0D and 2D molecular assemblies with the pyridazine-3,6-dicarboxylate linker

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Publication details

The article was received on 22 Mar 2010, accepted on 13 Jun 2010 and first published on 06 Sep 2010


Article type: Paper
DOI: 10.1039/C0CE00013B
Citation: CrystEngComm, 2011,13, 251-258
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    Lanthanide-based 0D and 2D molecular assemblies with the pyridazine-3,6-dicarboxylate linker

    N. Henry, S. Costenoble, M. Lagrenée, T. Loiseau and F. Abraham, CrystEngComm, 2011, 13, 251
    DOI: 10.1039/C0CE00013B

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