基于3，4-吡啶二羧酸的二维层状聚合物的合成和晶体结构

A metal-organic coordination polymer {La(PDC)(N-HPDC)]·H₂O}_n (1) (H₂PDC=pyridine-3,4-dicarboxylic acid) has been hydrothermally synthesized and structurally characterized by X-ray diffraction single-crystal structure determination, elemental analyses and IR spectroscopy. The complex crystallizes in the monoclinic system, space group P2₁/c with a=1.452 8(2) nm, b=0.681 59(11) nm, c=1.464 0(2) nm, β=94.270(2)°, V=1.445 6(4) nm³, D_c=2.243 Mg·m^-3, Z=4, M_r=488.14, F(000)=944, μ(Mo Kα)=3.015 mm^-1, R=0.031 0 and wR=0.076 2 for 2 424 observed reflections (I>2σ(I)). There are La-O-C-O-C-La double chains in the complex. The chelating carboxylate O atoms and pyridyl N atoms lead the compound to 2D layers structure, which is extended to 3D supramolecular architecture through intermolecular hydrogen bonds. It is interesting that the polymer containing one-dimensional channels. CCDC: 708868.

Synthesis and Crystal Structure of 2D Layer Lanthanum Polymer Constructed from Pyridine-3,4-dicarboxylate Ligand

A metal-organic coordination polymer {La(PDC)(N-HPDC)]·H2O}n (1) (H2PDC=pyridine-3A-dicarboxylic acid) has been hydrothermally synthesized and structurally characterized by X-ray diffraction single-crystal structure determination, elemental analyses and IR spectroscopy. The complex crystallizes in the monoclinic system, space group P21/c with a=1.452 8(2) nm, b=0.681 59(11) nm, c=1.464 0(2) nm, β=94.270(2)°, V=1.445 6(4) nm3, Dc=2.243 reflections (I>2σ(I)). There are La-O-C-O-C-La double chains in the complex. The chelating carboxylate O atoms and pyridyl N atoms lead the compound to 2D layers structure, which is extended to 3D supramolecular architecture through intermolecular hydrogen bonds. It is interesting that the polymer containing one-dimensional channels. CCDC: 708868.