Five coordination polymers, namely, [Cd(µ₃–5-nip)(µ-obix)]_n (1), [Co(µ₃–5-nip)(µ-obix)]_n (2), [Zn(µ−5-nip)(µ-obix)]_n (3 and 4) and [Cd(µ−5-nip)(µ-bisobix)]_n (5) (5-nip: 5-nitroisophthalate, obix: 1,2-bis(imidazol-1ylmethyl)benzene, bisobix: 1,2-bis(2-isopropylimidazol-1ylmethyl)benzene) were hydrothermally synthesized and characterized by IR spectroscopy, elemental analysis, single crystal and powder X-ray diffraction and thermal analysis (TG/DTA). X-ray results showed that the complexes displayed structural diversity depending on metal ions and conformations of bis(imidazole) linkers. Complexes 1 and 2 were 1D structures and obix ligand displayed cis-conformation. Complexes 3 and 4 exhibited 2D and 3D structures with same components depending on obix conformation. In complex 5, 3D+3D→3D interpenetrated structure was obtained with dia topology when bisobix having sterically hindered groups on imidazole rings was used. Moreover, thermal, photoluminescence and optical properties of the complexes were also investigated.

五个配位聚合物，即[Cd（µ ₃ –5-nip）（µ-obix）] _n（1），[Co（µ ₃ –5-nip）（µ-obix）] _n（2），[Zn （µ−5 nip）（µ-obix）] _n（3和4）和[Cd（µ−5- nip）（µ-bisobix）] _n（5）（水热合成5-nip：5-硝基间苯二甲酸酯，obix：1,2-双（咪唑-1基甲基）苯，bisobix：1,2-双（2-异丙基咪唑-1基甲基）苯），并通过红外光谱进行表征，元素分析，单晶和粉末X射线衍射和热分析（TG / DTA）。X射线结果表明，该配合物根据金属离子和双（咪唑）接头的构象而显示出结构上的多样性。配合物1和2为一维结构，obix配体显示顺式构象。配合物3和4表现出具有相同成分的2D和3D结构，具体取决于obix构象。在复杂5当使用在咪唑环上具有空间位阻基团的bisobix时，通过dia拓扑获得了3D + 3D→3D互穿结构。此外，还研究了配合物的热，光致发光和光学性质。