配位聚合物[Zn(3-aba)_2]_n·nH_2O和[Cd(3-aba)_2]_n的合成与晶体结构  被引量:7

Synthesis and Crystal Structure of Coordination Polymers [Zn(3-aba)_2]_n·nH_2O and [Cd(3-aba)_2]_n

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作  者:谭安治[1,2] 韦友欢[1] 陈自卢[1] 梁福沛[1] 胡瑞祥[1] 

机构地区:[1]广西师范大学化学化工学院 [2]玉林师范学院化学与生物系,玉林537000

出  处:《无机化学学报》2006年第3期394-398,共5页Chinese Journal of Inorganic Chemistry

基  金:广西自然科学基金资助项目(No.桂科自0229004)。

摘  要:用水热法合成了2个新的配位聚合物[Zn(3-aba)2]n·nH2O(1)和[Cd(3-aba)2]n(2)(3-aba=间氨基苯甲酸阴离子),对它们进行了元素分析、热分析、红外光谱和X射线单晶衍射等表征。配位聚合物1晶体属正交晶系,Pca21空间群,晶体学数据为:a=0.92626(8)nm,b=1.60073(15)nm,c=1.88522(17)nm,β=90°,V=2.7952(4)nm3,Z=4,μ=1.783mm-1,Dc=1.690g·cm-3,R1=0.0279,wR2=0.0648;配位聚合物2晶体属单斜晶系,P21/n空间群,晶体学数据为:a=0.90068(7)nm,b=0.45203(4)nm,c=1.56802(12)nm,β=106.0750(10)°,V=0.61343(9)nm3,Z=1,μ=1.799mm-1,Dc=2.082g·cm-3,R1=0.0198,wR2=0.0558。在配合物1中,配体分子以双齿配位模式与锌离子配位,而在配合物2中,它以三齿配位模式与镉离子配位。2个配合物均具有二维网状结构。Two new coordination polymers [Zn(3-aba)2]n·nH2O (1) and [Cd(3-aba)2]n (2) (3-aba=3-aminobenzoic acid anion) were synthesized and characterized by elemental analysis, thermal analysis, IR. Their crystal structures were determined by X-ray diffraction method. The crystal of complex 1 belongs to orthorhombic system with space group Pca21 and that of complex 2 belongs to monoelinic system with space group P21/n. The crystallographic data are: a=0.926 26(8) nm, b=1.600 73(15) nm, c=1.885 22(17) nm, β=90°, V=2.795 2(4) nm^3, Z=4,μ= 1.783 mm^-1, Dc=1.690 g·cm^-3, R1=0.027 9,ωR2=0.064 8 for 1; a=0.900 68(7) nm, b=0.452 03(4) nm, c=1.568 02 (12) nm, β=106.075 0(10)°, V=0.613 43(9) nm^3, Z=1,μ=1.799 mm^-1, Dc=2.082 g·cm^-3, Rr=0.019 8, ωR2=0.055 8 for 2. In the complex 1, the 3-aminobenzoic acid anion coordinates to Zn(Ⅱ) in a μ2-bridge mode with its nitrogen atom and one of its oxygen atoms, while it coordinates to Cd(Ⅱ) ion in a μ3-bridge mode with its nitrogen atom and two oxygen atoms of the carboxylate in the complex 2. Both coordination polymers exhibit a two-dimensional network structure.

关 键 词:间氨基苯甲酸   配位聚合物 

分 类 号:O614.241[理学—无机化学]

 

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