In situ construction of four copper(I) cyanide coordination polymers: crystal structures, fluorescence and catalytic properties
作者:Xu Zhang、Gui Ying Dong、BaoYi Yu、Kristof Van Hecke、Guang Hua Cui
DOI:10.1007/s11243-015-9987-1
日期:2015.11
Four Cu(I) cyanide coordination polymers, namely [Cu(L1)(CN)] n (1), [Cu2(L2)(CN)2] n (2), [Cu2(L3)(CN)2] n (3) and [Cu2(L4)(CN)2] n (4) (L1 = 4,4′-bis(1,2,4-triazolyl-1-yl)-biphenyl, L2 = 1,4-bis(5,6-dimethylbenzimidazole)butane, L3 = 1,3-bis(2-methylbenzimidazole)propane, L4 = 1,5-bis(5,6-dimethylbenzimidazole)pentane), were synthesized and structurally characterized by X-ray single-crystal diffraction. The cyanide anions in these complexes were generated in situ by cleavage of the C–C bond of acetonitrile under hydrothermal conditions. Complex 1 possesses a 1D infinite ladder-like chain structure, while complexes 2, 3 and 4 exhibit similar 2D (6,3) networks. Both 3 and 4 are further extended into 3D supramolecular frameworks by C–H···π stacking interactions. The fluorescence properties of the complexes and their catalytic activities for the degradation of Congo red azo dye in a Fenton-like process were investigated.
合成了四种Cu(I)氰化物配位聚合物,即[Cu(L1)(CN)] n (1)、[Cu2(L2)(CN)2] n (2)、[Cu2(L3)(CN)2] n (3)和[Cu2(L4)(CN)2] n (4)(其中L1 = 4,4′-双(1,2,4-三唑基-1-基)联苯,L2 = 1,4-双(5,6-二甲基苯并咪唑)丁烷,L3 = 1,3-双(2-甲基苯并咪唑)丙烷,L4 = 1,5-双(5,6-二甲基苯并咪唑)戊烷),并通过X射线单晶衍射进行了结构表征。这些复合物中的氰离子是在水热条件下通过乙腈C–C键的断裂原位生成的。复合物1具有一维无限梯状链结构,而复合物2、3和4则展现出类似的二维(6,3)网络。复合物3和4进一步通过C–H···π堆积相互作用扩展为三维超分子框架。研究了这些复合物的荧光特性及其在类芬顿反应中对刚果红偶氮染料降解的催化活性。