Synthesis and Crystal Structure of a 2D Coordination Polymer： Nd2（PDB）2（CH3COO）2（H2O）3

摘要

cqvip:A novel coordination polymer [Nd2(PDB)2(CH3COO)2(H2O)3] (H2PDB = pyridine- 3,4-dicarboxylic acid) has been synthesized by the reaction of Nd(CH3COO)3 with pyridine- 3,4-dicarboxylic acid under hydrothermal conditions. Elemental analysis, IR spectra and X-ray crystal structure analysis were carried out to determine the composition and crystal structure of the title complex which belongs to the triclinic system, space group P1 with a = 6.9409(14), b = 7.5497(15), c = 22.530(5) , α = 84.79(3), β = 88.15(3), γ = 75.55(3)°, C18H18N2O15Nd2, Mr = 790.82, Z = 2, V = 1138.5(4) 3, Dc = 2.307 g/cm3, μ = 4.593 mm-1, –6≤h≤8, –5≤k≤8, –26≤l≤ 26, F(000) = 760, Rint = 0.0298, R = 0.0314 and wR = 0.0695 (I > 2σ(I)). Nd(1) and Nd(2) are linked into zigzag chains by carboxylate groups of acetate with interesting μ3-η2:η2 fashion. The zigzag chains are bridged by PDB to form a 2D framework, and a 3D supramolecular network is further constructed via π-π stacking.