Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, PR China.
Dalton Trans. 2013 Sep 14;42(34):12324-33. doi: 10.1039/c3dt51114f. Epub 2013 Jul 15.
Eight new Zn(II) coordination polymers based on flexible 1,4-di(1H-imidazol-1-yl)butane and different dicarboxylates, [Zn(dimb)(suc)·2DMF]n (1), [Zn(dimb)(mbda)·3H2O]n (2), [Zn(dimb)(adip)·DMF·2H2O]n (3), [Zn(dimb)(pma)·2.5H2O]n (4), [Zn2(dimb)(tha)2(H2O)]n (5), [Zn(dimb)(chda)·2H2O]n (6), [Zn(dimb)(obda)·DMF]n (7), [Zn(dimb)(tdga)·CH3OH]n (8) (dimb = 1,4-di(1H-imidazol-1-yl)butane, H2suc = succinic acid, H2mbda = m-benzenediacetic acid, H2adip = adipic acid, H2pma = pimelic acid, H2tha = thiophene-2,5-dicarboxylic acid, H2chda = 1,4-cyclohexanedicarboxylic acid, H2obda = o-benzenediacetic acid, H2tdga = thiodiglycolic acid; DMF = N,N'-dimethylformamide), have been synthesized and structurally characterized by single-crystal X-ray diffraction analyses, and further characterized by infrared spectra (IR), elemental analyses, powder X-ray diffractions (PXRD) and thermogravimetric analyses (TGA). Single-crystal X-ray diffraction analysis reveals that 1, 2, 4, 7 and 8 are 2D wavy 4(4)-sql networks with different dimensions of quadrilateral window units, depending on the conformation and length of dimb and dicarboxylates. Complex 3 is a 2D a 6(3)-hcb network incorporating a [Zn2(dimb)2] cyclic subunit. In complex 5, Zn(II) centers as 3-connected node are linked by dimb and tha to form a 3D 8-fold interpenetrating ThSi2 network. Complex 6 is a 4-connected noninterpenetrating cds network. Interestingly, an infinite T4(2)6(2) water tape and a D2h cyclic water tetramer are also found in complexes 2 and 3, respectively. In 1-8, all Zn(II) centers are located in a four-coordinated environment, and dimb and dicarboxylates are 2-connected linkers, but networks with diverse topologies are built, which indicates the linkage of central metal ion, the conformation of dimb and dicarboxylate have important influences on the resulting structures. Furthermore, the solid-state photoluminescence properties of the 1-8 were investigated at 298 and 77 K.
基于柔性 1,4-二(1H-咪唑-1-基)丁烷和不同二羧酸配体的 8 个新型 Zn(II)配位聚合物，[Zn(dimb)(suc)·2DMF]n（1）、[Zn(dimb)(mbda)·3H2O]n（2）、[Zn(dimb)(adip)·DMF·2H2O]n（3）、[Zn(dimb)(pma)·2.5H2O]n（4）、[Zn2(dimb)(tha)2(H2O)]n（5）、[Zn(dimb)(chda)·2H2O]n（6）、[Zn(dimb)(obda)·DMF]n（7）、[Zn(dimb)(tdga)·CH3OH]n（8）（dimb=1,4-二(1H-咪唑-1-基)丁烷，H2suc=琥珀酸，H2mbda=m-苯二甲酸，H2adip=己二酸，H2pma=戊二酸，H2tha=噻吩-2,5-二甲酸，H2chda=1,4-环己烷二甲酸，H2obda=邻苯二甲酸，H2tdga=硫代二甘酸；DMF=N,N'-二甲基甲酰胺），通过单晶 X 射线衍射分析进行了合成和结构表征，并通过红外光谱（IR）、元素分析、粉末 X 射线衍射（PXRD）和热重分析（TGA）进一步进行了表征。单晶 X 射线衍射分析表明，1、2、4、7 和 8 是具有不同尺寸四边形窗口单元的二维波浪状 4(4)-sql 网络，这取决于 dimb 和二羧酸的构象和长度。配合物 3 是一个二维 a6(3)-hcb 网络，其中包含一个[Zn2(dimb)2]环状亚基。在配合物 5 中，Zn(II)中心作为 3 连接节点，通过 dimb 和 tha 连接形成三维 8 重互穿 ThSi2 网络。配合物 6 是一个 4 连接的非互穿 cds 网络。有趣的是，在配合物 2 和 3 中还分别发现了无限的 T4(2)6(2)水带和 D2h 环状水四聚体。在 1-8 中，所有 Zn(II)中心都位于四配位环境中，dimb 和二羧酸是 2 连接配体，但构建了具有多种拓扑结构的网络，这表明中心金属离子的连接、dimb 和二羧酸的构象对所得结构有重要影响。此外，还在 298 和 77 K 下研究了 1-8 的固态光致发光性质。
