基于3,4-吡啶二羧酸配体的钆(Ⅲ)配合物的合成、晶体结构及热性质(英文)

Synthesis,Crystal Structure and Thermal Properties of A Gadolinium(Ⅲ) Coordination Polymer Constructed by Pyridine-3,4-dicarboxylate Ligand

The hydrothermal reaction of pyridine-3,4-dicarboxylic acid(pydcH2),4,4'-bipyridine and GdCl3.6H2O yield a novel gadolinium coordination polymer {[Gd2(pydc)2(μ3-OH)2(H2O)2].H2O}n(1).The compound was chara-cterized by elemental analysis,thermal analysis,IR spectra and single-crystal X-ray structure analysis.The crystal of the Gd(Ⅲ) complex belongs to triclinic system,space group P1 with:a=0.796 25(16) nm,b=0.944 46(19) nm,c=1.262 1(3) nm,α=76.50(3)°,β=84.95(3)°,γ=83.04(3)°,Z=2,V=0.914 4(3) nm3,Dc=2.669 g.cm-1,μ=7.269 mm-1,F(000)=692,and R1=0.033 3,wR2=0.062 3.The crystal structure revealed that compound 1 has a 2D layer structure incorporating 1D Gd-O-Gd double chain,and hydrogen bonding interactions result in the former of 3D supramolecular network structure.CCDC:669079.

The hydrothermal reaction of pyridine-3,4-dicarboxylic acid （pydcH2）, 4,4＇-bipyridine and GdCl3·6H2O yield a novel gadolinium coordination polymer {[Gd2（pydc）2（μ3-OH）2（H2O）2]·H20}n （1）. The compound was chara-cterized by elemental analysis, thermal analysis, IR spectra and single-crystal X-ray structure analysis. The crystal of the Gd（llI） complex belongs to trielinic system, space group P^-1 with： a=0.79625（16） nm, b=0.94446（19） nm, c=1.2621（3）nm, α=76.50（3）°, β=84.95（3）°, γ=83.04（3）°, Z=2, V=0.9144（3）nm^3, Dc=2.669g·cm^-1,μ=7.269mm^-1, F（000）=692, and R1=0.0333, ωR2=0.0623. The crystal structure revealed that compound 1 has a 2D layer structure incorporating 1D Gd-O-Gd double chain, and hydrogen bonding interactions result in the former of 3D supramoleeular network structure. CCDC： 669079.