Five new coordination polymers Cu（phen）（H2O）（phth）·CH3OH（1）, [Cu（2,2′-bipy）（H2O）]（phth）·3.5H2O（2）, Zn（phen）（phth）（H2O）·1.125H2O（3） and [M（4,4′-bipy）（H2O）2]（phth）·2H2O[M=Zn（4）, Mn（5）]（H2phth=phthalic acid, bipy=bipyridine, phen=1,10-phenanthroline） have been synthesized from the amino acid derivatives（phthalyl-l- valine, H2L） and structurally characterized. H2L was hydrolyzed into phth2- group during the reaction, but the strucure feature was different from that of the complex directly synthesized from H2phth in the reported literature, revealing that H2L played an important role in composing the novel compounds. Compounds 1, 2 and 3 are all 1D chains, but the differences are that compound 1 is further hydrogen-bonded into 2D networks, and compound 2 is further extended into 3D supramolecular network through π-π stacking and hydrogen-bonding interactions. However, compound 3 is a 1D helix chain structure and further links into 2D networks through π-π stacking. Compounds 4 and 5 are isostructural and exhibit the same 2D layers, which are further connected by hydrogen-bonding interactions to form 3D supramolecular network. Antiferromagnetic superexchange was observed for compounds 1, 2 and 5.
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 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,Dc=2.243 Mg.m-3,Z=4,Mr=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.
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.
1 Introduction The design and construction of metal-organic polymers has been a field of rapid growth in materials chemistry because of their intriguing topologies and potential applications as functional materials. In this regard, every effort has been devoted to the deliberate design and control of self-assembly infinite coordination networks via selecting the chemistry structures of ligands, Multidentate carboxylate ligands are widely adopted for construction of coordination frameworks due to their rich coordination modes.
LI Ya-JuanLIANG QingSONG Hui-huaJIA Mi-yingSHI Shi-KaoZHANG Jian-jun
