联苯二甲酸铒(Ⅲ)配合物的合成及其晶体结构与热性能  

Synthesis,Crystal Structure and Thermal Property of Erbium(Ⅲ) Complex with 2,2′-Biphenyldicarboxylic Acid

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作  者:汪童程[1] 冯建华[1] 左锣[1] 吴刚[1] 洪先军[1] 刘丙义[1] 

机构地区:[1]滁州学院材料与化学工程学院,安徽滁州239012

出  处:《合成化学》2013年第3期298-301,共4页Chinese Journal of Synthetic Chemistry

基  金:滁州学院大学生科研项目(2012XS18;2012XS19);安徽省应用化学重点建设学科基金资助项目(200802187C)

摘  要:2,2'-联苯二酸(H2BPDA)和Er2O3经水热法合成了配合物[Er(BPDA)1.5(H2O)](1),其结构经IR,元素分析和单晶X-射线表征。1属单斜晶系,C2/c空间群的一维链结构,晶胞参数a=20.962 0(11),b=21.3086(11),c=8.156 4(4),β=104.141 0(10)°,V=3 526.8(3)3,Z=8,Dc=2.055 g.cm-3,μ=4.804mm-1,F(000)=2 112,R1=0.019 8,wR2=0.051 0,S=1.061。Er1(Ⅲ)采取八配位的反四棱柱几何构型,而Er2(Ⅲ)采取八配位的四棱柱几何构型,配体BPDA2-的2个羧基分别采用μ2-η2:η1和μ2-η1:η1配位模式,BP-DA2-作为μ3-桥连结Er(Ⅲ)形成1D链结构,进一步通过C-H┈O氢键将1D链连结在一起形成2D和3D结构。1的第一热分解温度为167℃,第二热分解温度为167℃~710℃。1D coordination complex, Er(BPDA) 1.5 (H2O) ( 1 ), was synthesized by hydrothermal synthesis of 2,2'-biphenyldiearboxylic acid (H2BPDA) with Er2O3. The structure was characterized by IR, elemental analysis and single-crystal X-ray diffraction. 1 belongs to monoclinic, space group C2/c with a =20.962 0(11) A, b =21.308 6(11) A, c =8. 156 4(4) A, β = 104. 141 0(10)°, V=3 526.8(3) A^3, Z=8, Dc=2.055 g · cm^-3,μ=4.804 mm^-1, F(000) =2 112, R1 =0.019 8, wR2 =0.051 0, S = 1. 061. The crystal structure reveals that Er( III ) center adopts distorted square anti-prism and square prism geometries. Carboxylate groups takeμ2-η^2:η^1 andμ2-η^1:η^1coordination models, respectively. The BPDA^2- acts as the/xa-bridge connecting Er( 111 ) centers to result in a one dimensional chain structure. Further, ID chains of 1 are connected together to form 2D and 3D structure through C -H-O hydrogen bonding interactions. The first and second decomposition temperature of 1 were 167 ℃ and 167℃ -710℃, respectively.

关 键 词:稀土金属配合物 水热合成法 热稳定性 

分 类 号:O627[理学—有机化学] O641.4[理学—化学]

 

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