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Journal of Coordination Chemistry Volume 65, 2012 - Issue 3
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Original Articles

Construction of three metal-organic frameworks based on multifunctional T-shaped tripodal ligands (4,5-dicarboxy-1H-imidazol-2-yl)pyridine-1-oxide

Li-Zhuang Chen School of Biology and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P.R. ChinaCorrespondence[email protected]
,
Fang-Ming Wang School of Biology and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P.R. China
&
Hong Shu School of Biology and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P.R. China
Pages 439-452 | Received 20 Mar 2011, Accepted 14 Dec 2011, Published online: 31 Jan 2012
 
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Abstract

Three metal-organic frameworks, [Eu(C10H6N3O5)3(H2O)2] · H2O (1), [Tb(C10H6N3O5)3(H2O)2] · H2O (2), and [Cd(C10H6N3O5)2Cl2] (3) based on T-shaped tripodal ligands 3-(4,5-dicarboxy-1H-imidazol-2-yl)pyridine-1-oxide and 4-(4,5-dicarboxy-1H-imidazol-2-yl)pyridine-1-oxide (H3DCImPyO), have been synthesized by the hydrothermal method and characterized by elemental analysis, IR, and single-crystal X-ray structure analysis. The diverse coordination modes of H3DCImPyO ligands have afforded the three compounds. Complexes 1 and 2 are isomers and the Ln (Ln = Eu or Tb) atoms have coordination number eight with a distorted square prism geometry. The partly deprotonated H2DCImPyO− ligands display three different coordination modes to link Ln (Ln = Tb or Eu) into 1-D double chains. In 3, Cd(II) lies on an inversion center and displays a slightly distorted octahedral coordination. All three compounds exhibit strong fluorescent emissions in the solid state at room temperature.

Acknowledgments

This work was financially supported by the National Natural Science Foundation of China and the Foundation of Jiangsu Educational Committee (11KJB150004), China.

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