A new series of lanthanide coordination polymers with 2,2′-bipyridine and glutaric acid: Synthesis, crystal structures and properties of [Ln(bipy)(glut)(NO3)]

A series of new lanthanide coordination polymers, with the formula [Ln(bipy)(glut)(NO3)] (Ln = Eu (1), Tb (2), Sm (3), Pr (4); bipy = 2,2′-bipyridine; H2glut = glutaric acid), have been synthesized under the hydrothermal condition and characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction, and single-crystal X-ray diffraction. Structural analyses reveal that all four complexes are isostructural and crystallized in monoclinic system, P21/c space group. For these complexes, the Ln3+ are all linked through glutaric acid ligands to form 1D chain-like polymeric structures, and bipy and NO3- are coordinated on two sides of the chains. The thermogravimetric analysis of 1 and photoluminescent properties of 1 and 2 are discussed in detail.