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.
A one-dimensional complex,[Gd2(PDC)3(phen)(H2O)·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,Mr=1 026.05,Triclinic,space group P,a=0.751 07(15) nm,b=1.256 5(3) nm,c=1.825 7(4) nm,α= 70.80(3)°,β=79.00(3)°,γ=76.05(3)°,V=1.567 4(5) nm3,the final refinement gave R=0.022 4 and wR=0.047 5 for 4 913 observed reflections with I>2σ(I).The coordination polymer displays a 1D belt-like chain.The 1D chain connected with adjacent chains through π-π stacking interaction of phen groups to form 2D layers,which are further extended to a 3D supramolecular network through H-bonds interaction.CCDC: 671430.
