Syntheses, crystal structures and luminescent properties of three metal coordination polymers based on aromatic carboxylic acids and 2-(pyridine-4-yl)-(1H)-benzoimidazole

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• 作者：Shi-Jie Zhan ; Yu Sun ; Shu-Ping Li ; Gui-Mei Tang ; ^{meiguit@163.com} ; Yong-Tao Wang ; ^{ceswyt@qlu.edu.cn} ; Yue-Zhi Cui
• 关键词：Hydrothermal reaction ; 2-(Pyridine-4-yl)-(1H)-benzoimidazole ; Aromatic carboxylic acid ; Luminescence ; Crystal structure
• 刊名：Polyhedron
• 出版年：2017
• 出版时间：10 January 2017
• 年：2017
• 卷：121
• 期：Complete
• 页码：252-263
• 全文大小：4176 K
• 卷排序：121

文摘

Three new metal coordination complexes, namely [Co(IPA)(4PBI)]·H2O (1), [Cd(IPA)(4PBI)(H2O)] (2) and [Cd(TPA)(4PBI)(H2O)] (3) [4PBI = 2-(pyridine-4-yl)-(1H)-benzoimidazole, IPA = isophthalate and TPA = terephthalate], were obtained under hydrothermal conditions by reacting cobalt and cadmium salts with 4PBI and IPA or TPA. Complexes 1–3 were structurally characterized by X-ray single-crystal diffraction, EA, IR and PXRD. All of these complexes display low dimensional features with one-dimensional (1D) motifs. Complex 1 is a 1D tape-like structure containing bi-nuclear units, which is further extended into a 3D supramolecular architecture through intermolecular hydrogen bonds and stacking interactions. Complex 2 shows a 1D structural motif, which is further assembled into a 3D supramolecular architecture by hydrogen bonds and packing interactions. Complex 3 is also a 1D chain. Through intermolecular hydrogen bonds and π⋯π packing interactions, a 3D supramolecular network is also generated for 3. The luminescent properties of complexes 2 and 3 were investigated in the solid state at room temperature. Additionally, thermogravimetric analysis (TGA) of 1–3 has been discussed in details.