Two-Dimensional Lanthanide(Iii) Coordination Polymers: Solvothermal Synthesis, Crystal Structure, And Stability

Based on 2-(4-pyridyl)-terephthalate (H(2)pta) and oxalate ligands, two new lanthanide-containing coordination polymers (CPs), [Tb(pta)(C2O4)(0.5)(H2O)(2))]center dot 2H(2)O (1) and [Sm(pta)(C2O4)(0.5)(H2O)(2))]center dot 2H(2)O (2), have been synthesized under solvothermal conditions. The structures of both 1 and 2 have been determined by single-crystal X-ray diffraction. Infrared, elemental analysis, powder X-ray diffraction and thermogravimetric analysis data are also presented. The crystals of 1 and 2 exhibit isostructural layer-like networks, crystallizing in the triclinic space group P (1) over bar. The layers are further stabilized and associated into 3D architectures through hydrogen bonding. Remarkably, the CPs 1 and 2 exhibit excellent water stability and remarkable thermostability with thermal decomposition temperatures of more than 420 degrees C.