Two heterometal–organic coordination polymers with chelidamic acid: Syntheses, structures and optical properties

Two heterometal–organic coordination polymers with chelidamic acid ligands, [AgNd(C7H3NO5)2·3H2O]n (1) and 0.75H3O·[K0.25Nd(C7H3NO5)2·3H2O]·1.75H2O (2), have been synthesized and characterized by X-ray single-crystal diffraction. The crystal structure of 1 features that chelating units composed of one Nd(III) ion and two tridentate chelating chelidamic acid ligands are connected by the Ag(I) ions to form a one-dimensional chain, further linked by hydrogen bonds into a 3D network. As for 2, discrete independent molecules, made up of Nd(III) and K(I) ions and chelidamic acid ligands, are linked through the hydrogen bonds to form a 1D chain, which are further inter-linked through the complex hydrogen bonds to form a 3D network. The optical properties of 1 and 2 were investigated in terms of fluorescent spectra, which both exhibit good luminescence.

Two novel heterometal–organic coordination polymers with chelidamic acid, [AgNd(C7H3NO5)2·3H2O]n (1) and 0.75H3O·[K0.25Nd(C7H3NO5)2·3H2O]·1.75H2O (2), have been synthesized and characterized. The crystal structure of 1 features that chelating units composed of one Nd(III) ion and two chelidamic acid ligands are connected by Ag(I) ions to form 1D chain. As for 2, discrete molecules are linked through H-bonds to form 3D network.Figure optionsDownload as PowerPoint slideHighlights
► Two novel heterometal-organic coordination polymers with chelidamic acid have been obtained.
► The synthses condition of heterometal-organic coordination polymers was systematically investigated.
► The title compounds may be both good candidates for luminescent materials.