具有一维孔道的三维配位聚合物{[La_2(C_3H_2O_4)_3(H_2O)_6]·2H_2O}_n的合成和晶体结构

Synthesis and crystal structure of{[La_2(C_3H_2O_4)3(H_2O)_6]·2H_2O}_n:a 3-D coordination polymer with 1-D channels

利用常规水溶液法合成了一种新颖的三维配位聚合物{[La2(C3H2O4)3(H2O)6]·2H2O}n(1)(C3H2O4=1,3-丙二酸),用X射线单晶衍射、元素分析、红外光谱、热重分析对晶体结构进行了表征.X射线单晶衍射表明:该晶体属于正交晶系,Pbcn空间群;晶胞参数a=1.136 85(10)nm,b=1.274 99(11)nm,c=1.481 54(13)nm,α=90°,β=90°,γ=90°,V=2.147 5(3)nm3,Z=4,Dc=2.240g/cm3,μ=4.017mm-1,F(000)=1 384.0,S=0.975,R1=0.019 6,wR2=0.048 1[I>2σ(I)].在化合物1中,双核镧簇{La2O2}通过柔性配体丙二酸组装成了一个具有一维孔道的三维网络,孔道里容纳着结晶水.

A novel three-dimensional（3D）coordination polymer of{[La2（C3H2O4）3（H2O）6]·2H2O}n（C3H2O4=1,3-propandioic acid）has been synthesized by convenient aqueous solution method and structurally characterized by single-crystal X-ray diffraction,IR spectra,elemental analysis and TG analysis.Single-crystal X-ray analysis reveals that the title compound is crystallized in the orthorhombic system,space group Pbcn with a=1.136 85（10）nm,b=1.274 99（11）nm,c=1.481 54（13）nm,α=90°,β=90°,γ=90,V=2.147 5（3）nm3,Z=4,Dc=2.240g/cm^3,μ=4.017mm^-1,F（000）=1 384.0,S=0.975,R1=0.019 6,wR2= 0.048 1 [I〉2σ（I）].In compound 1,binuclear{La2O2}clusters are linked through flexible ligands propandioic acid to generate a novel 3Dnetworks with 1-D channels encapsulating crystal water.