Syntheses,structures and luminescent properties of four copper(I) cyanide coordination polymers based on 2-(n-pyridyl)benzimidazole ligands (n = 2, 3, 4) |
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| Authors: | Hui Wang Ming-Xing Li Min Shao Xiang He |
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| Institution: | 1. Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China;2. Instrumental Analysis and Research Center, Shanghai University, Shanghai 200444, China |
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| Abstract: | Four copper(I) cyanide coordination polymers containing 2-(n-pyridyl)benzimidazole ligands, namely Cu2(CN)(2-PyBIm)]n (1), Cu2(CN)2(3-PyHBIm)]n (2), {Cu3(CN)3(4-PyHBIm)4] · 2H2O}n (3) and Cu5(CN)3(4-PyBIm)2]n (4), have been synthesized and characterized by X-ray crystallography. Complex 1 is a one-dimension coordination polymer in which 2-(2-pyridyl)benzimidazole is deprotonated and adopts a bridging tridentate coordination mode. Complex 2 has ladder-like structure in which 2-(3-pyridyl)benzimidazole does not deprotonate and acts as a bidentate bridge. Complex 3 displays a saddle-shaped helical chain constructed through μ2-cyanide group and the outstretched neutral 2-(4-pyridyl)benzimidazole monodentate ligand. Complex 4 shows two-dimension layer polymeric structure in which deprotonated 2-(4-pyridyl)benzimidazole acts as a tridentate bridging ligand. The cyanide groups in four complexes all act as bidentate bridging ligands. These complexes are thermal stable and display luminescence in the solid states. |
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| Keywords: | Copper(I) cyanide 2-(n-Pyridyl)benzimidazole Coordination polymer Crystal structure Thermal stability Luminescence |
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