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Crystal structure and fluorescence of the supramolecular complex [Dy(H2L)(HL)(H2O)3]·0.5dipy·2H2O

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A novel dysprosium(III) complex of N-(2-propionic acid)salicyloylhydrazone (H3L) and 2,2-dipyridyl (dipy) was prepared and characterized. The crystal structure of [Dy(H2L)(HL)(H2O)3] · 0.5dipy · 2H2O was determined by single-crystal X-ray diffraction methods. In the structure, Dy(III) is 9-coordinated by carboxyl O, acyl O atoms and azomethine N atoms of two ligands (H2L and HL forms) and O atoms from three water molecules. H2L and HL act as tridentate ligands, which form two stable five-numbered rings in the keto form, as indicated by the crystal structure and IR data. The coordination polyhedron around Dy(III) can be described as a monocapped square antiprism. A free 2,2-dipyridyl molecule and two water molecules are connected to coordinated water and ligands by hydrogen bonds to form a three-dimensional structural motif. The complex is highly fluorescent.
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Keywords: 2,2-Dipyridyl; Crystal structure; Dysprosium(III); Fluorescence; N-(2-propionic acid)salicyloylhydrazone

Document Type: Research Article

Affiliations: Department of Chemistry, Northwest University and Shaanxi Key Laboratory of Physical Inorganic Chemistry, Xi'an, Shaanxi 710069, P.R. China

Publication date: January 1, 2007

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