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首页> 外文期刊>Crystal growth & design >Three 3D coordination polymers constructed by Cd(II) and Zn(II) with imidazole-4,5-dicarboxylate and 4,4 '-bipyridyl building blocks
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Three 3D coordination polymers constructed by Cd(II) and Zn(II) with imidazole-4,5-dicarboxylate and 4,4 '-bipyridyl building blocks

机译:由Cd(II)和Zn(II)与4,5-二羧酸咪唑和4,4'-联吡啶基结构单元构建的三种3D配位聚合物

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Three 3D coordination polymers of {(H(2)bpy)[Cd-9(HIDC)(4)(IDC)(4)(bpy)(4)]center dot 8H(2)O}(n) (1), [Zn-3(IDC)(2)(bpy)(H2O)(2)](n) (2), and {[Zn-3(IDC)(2)(bpy)(3)]center dot(bpy)center dot 8H(2)O}(n) (3) (H3IDC = imidazole-4,5-dicarboxylic acid, bpy = 4,4'-bipyridyl) were hydrothermally synthesized by controlling the final pH values of the solutions of ca. 6, and characterized by single-crystal X-ray diffraction. In compound 1, unprecedented "double-square" units of [Cd-4(mu(3)-HIDC)(2)(mu(4)-IDC)(mu(5)-IDC)(2)(4-) are linked by [Cd(bpy)(2)](2+) to generate a ID chain of {[Cd-8(mu(3)-HIDC)(4)(mu(4)-IDC)(2)(mu(5)-IDC)(2)]Cd(bpy)(2)}(n)(2-), and the 1D chains are further bridged by mu 2-bpy to form a 2D brick-wall-like network of [Cd-8(mu(3)-HIDC)(4)(mu(4)-IDC)(2)(mu(5)-IDC)(2)(mu(2)-bpy)(2)}Cd(bpy)(2)}(n)(2n-) (equivalent to[Cd-9(HIDC)(4)(IDC)(4)(bpy)(4)](n)(2n-)). Each "brick" contains one protonated bpy ion of H(2)bpy(2+) to get a neutral compound of {(H-2)bpy)[Cd-9(HIDC)(4)(IDC)(4)(bpy)(4)]center dot 8H(2)O}(n). The adjacent 2D brick walls are perpendicularly packed and interlinked by mu(4)-IDC3- and mu(5)-IDC3- bridges to generate a 3D open framework of 1. The species of mu(3)-HIDC2-, mu(4)-IDC3-, mu(5)-IDC3-, H(2)bpy(2+), mu(2)-bpy, and monodentate bpy coexist in compound 1. Compound 2 consists of 2D wavelike sheets of [Zn-3(mu(3)-IDC)(2)(H2O)(2)], which are further linked through mu(2)-bpy to generate a 3D structure. In 3, the 2D honeycomb-like sheets of [Zn-3(IDC)(2)](n) are bridged by mu(2)-bpy to result in a 3D open framework with hexagonal and tetragonal channels. Compounds 1 and 2 are stable up to 320 and 400 degrees C, respectively, and display strong blue fluorescent emission at room temperature.
机译:{(H(2)bpy)[Cd-9(HIDC)(4)(IDC)(4)(bpy)(4)]中心点8H(2)O}(n)的三种3D配位聚合物(1) ,[Zn-3(IDC)(2)(bpy)(H2O)(2)](n)(2)和{[Zn-3(IDC)(2)(bpy)(3)]中心点( bpy)中心点8H(2)O}(n)(3)(H3IDC =咪唑-4,5-二羧酸,bpy = 4,4'-联吡啶)通过控制溶液的最终pH值水热合成ca.如图6所示,其特征在于单晶X射线衍射。在化合物1中,[Cd-4(mu(3)-HIDC)(2)(mu(4)-IDC)(mu(5)-IDC)(2)(4-)前所未有的“双平方”单元由[Cd(bpy)(2)](2+)链接以生成{[Cd-8(mu(3)-HIDC)(4)(mu(4)-IDC)(2)( mu(5)-IDC)(2)] Cd(bpy)(2)}(n)(2-),并且一维链进一步通过mu 2-bpy桥接,形成2D砖墙状网络[Cd-8(mu(3)-HIDC)(4)(mu(4)-IDC)(2)(mu(5)-IDC)(2)(mu(2)-bpy)(2)} Cd (bpy)(2)}(n)(2n-)(等效于[Cd-9(HIDC)(4)(IDC)(4)(bpy)(4)](n)(2n-))。每个“砖”都包含一个H(2)bpy(2+)的质子化bpy离子,得到{(H-2)bpy)[Cd-9(HIDC)(4)(IDC)(4)( bpy)(4)]中心点8H(2)O}(n)。相邻的2D砖墙垂直堆积并通过mu(4)-IDC3-和mu(5)-IDC3-桥相互连接以生成1的3D开放框架。mu(3)-HIDC2-,mu(4) )-IDC3-,mu(5)-IDC3-,H(2)bpy(2 +),mu(2)-bpy和单齿bpy共存在于化合物1中。化合物2由[Zn-3]的二维波状片组成(mu(3)-IDC)(2)(H2O)(2)],它们进一步通过mu(2)-bpy连接以生成3D结构。在3中,[Zn-3(IDC)(2)](n)的2D蜂窝状薄片被mu(2)-bpy桥接,从而形成具有六边形和四边形通道的3D开放框架。化合物1和2分别在高达320和400摄氏度的温度下稳定,并在室温下显示出强烈的蓝色荧光发射。

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