Synthesis, Crystal Structure and Thermogravimetric Analysis of A 1D Complex: [Gd2(PDC)3(phen)(H2O)•H2O]n

A one-dimensional complex, [Gd-2(PDC)(3)(phen)(H2O)center dot H2O](n) (H2PDC=pyridine-3,4-dicarboxylic acid, phen =1,10-phenanthroline), has been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, TG analysis, and X-ray single-crystal structure analysis. Crystallographic data for the title complex: C33H21Gd2N5O14, M-r=1 026.05, Triclinic, space group P (1) over bar, a=0.751 07(15) nm, b=1.256 5(3) run, c=1.825 7(4) nm, alpha= 70.80(3)degrees, beta=79.00(3)degrees, gamma=76.05(3)degrees, V=1.567 4(5) nm(3), the final refinement gave R=0.022 4 and wR=0.047 5 for 4 913 observed reflections with I>2 sigma(I). The coordination polymer displays a 1D belt-like chain. The 1D chain connected with adjacent chains through pi-pi stacking interaction of phen groups to form 2D layers, which are further extended to a 3D supramolecular network through H-bonds interaction. CCDC: 671430.