两个具stp三维拓扑构型的稀土配位聚合物{[Ln_2(pda)_3(H_2O)_2]·2H_2O}_n(Ln=Nd,La)

Two Coordination Polymers with 3D stp Topology {[Ln_2(pda)_3(H_2O)_2]·2H_2O}_n (Ln=Nd,La)

本文利用水热合成方法,将稀土氧化物与邻苯二乙酸(H2pda)反应得到了2个新颖的稀土配位聚合物{[Ln2(pda)3(H2O)2]·2H2O}n(Ln=Nd(1),La(2))。测定了它们的晶体结构,并进行了X-射线单晶衍射、红外光谱、荧光光谱和热重分析等性质的表征。晶体结构测定表明这2个化合物为异质同晶化合物。属单斜晶系,C2/c空间群。晶体学参数分别为配合物1:a=2.629 06(18)nm,b=1.611 72(11)nm,c=0.783 27(5)nm,β=93.173(5)°,V=3.313 9(4)nm3,Z=4,F(000)=1 840,μ=3.173 mm-1,Dc=1.878 g·cm-3,R1=0.022 6,wR2=0.060 9;配合物2:a=2.627 1(14)nm,b=1.614 9(8)nm,c=0.796 6(4)nm,β=92.850(9)°,V=3.375(3)nm3,Z=4,F(000)=1 816,μ=2.570 mm-1,Dc=1.823 g·cm-3,R1=0.0466,wR2=0.1416。化合物中邻苯二乙酸配体连接相邻的稀土金属离子,形成复杂的具有stp拓朴构型的三维网络结构。

Two isomorphous coordination polymers, {[Ln2（pda）3（H2O）2]·2H2O）}n（Ln=Nd,La））, have been hydrothermally synthesized by reaction of rare-earth oxides and o-phenylenediacetic acid （H2pda）. The two compounds have been characterized by X-ray single-crystal diffraction, infrared spectroscopy, fluorescence spectroscopy and TG analysis. Crystal structure determination shows that both two compounds crystallized in monoclinic, space group C2/c. Crystallographic parameters for complex 1, a=2.629 06 （18） nm, b=1.611 72 （11） nm, c=0.783 27（5） nm,β=93.173（5）°, V=3.313 9（4） nm3, Z=4, F（000）=1 840, u=3.173 mm-1, Do=1.878 g.cm-3, R1=0.022 6, wR2=0.060 9; complex 2, a=2.627 1（14） nm, b=1.614 9（8） nm, c=0.796 6（4） nm, β=92.850（9）°, V=3.313 9（4） nm3, Z=4, F（000）=1 816, u=2.570 mm-1, De =1.823 g .cm -3, R1 =0.0466, wR2=0.1416. In the two compounds, neighboring lanthanide ions are connected by o-phenylenediacetate to form 3D networks with stp topology. TG and FL analysis indicate that both compounds have good thermal stability and compound 2 exhibits emission in the solid state at room temperature. CCDC： 953279, 1; 952811, 2.