Li-Zhuang Chen, Fang‐Ming Wang, Hong Shu
Jan 31, 2012
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0
Influential Citations
24
Citations
Journal
Journal of Coordination Chemistry
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.