Two new isomeric zinc(II) metal-organic frameworks based on 1,5-bis(2-methyl-1H-imidazol-1-yl)pentane and 5-methylisophthalate ligands

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• 作者：Xiong-Wen Tan ; Heng-Feng Li and Chang-Hong Li
• 关键词：metal&ndash ; organic frameworks ; MOF ; 1 ; 5-bis(2-methyl-1H-imidazol-1-yl)pentane ; crystal structure ; 5-methylisophthalate ; fluorescence ; network topology
• 刊名：Acta Crystallographica Section C
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：73
• 期：2
• 页码：78-83
• 全文大小：1243K
• ISSN：1600-5759

文摘

Many factors, such as temperature, solvent, the central metal atom and the type of coligands, may affect the nature of metal–organic frameworks (MOFs) and the framework formation in the self-assembly process, which results in the complexity of these compounds and the uncertainty of their structures. Two new isomeric Zn^II metal–organic frameworks (MOFs) based on mixed ligands, namely, poly[[μ-1,5-bis(2-methyl-1H-imidazol-1-yl)pentane-κ²N³:N^3′](μ-5-methylisophthalato-κ²O¹:O³)zinc(II)], [Zn(C₉H₆O₄)(C₁₃H₂₀N₄)]_n, (I), and poly[[μ-1,5-bis(2-methyl-1H-imidazol-1-yl)pentane-κ²N³:N^3′](μ₃-5-methylisophthalato-κ³O¹:O^1′:O³)(μ₃-5-methylisophthalato-κ⁴O¹:O^1′:O³,O^3′)dizinc(II)], [Zn₂(C₉H₆O₄)₂(C₁₃H₂₀N₄)]_n, (II), have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis and thermogravimetric analysis. Complex (I) displays a two-dimensional layer net, while complex (II) exhibits a twofold interpenetrating three-dimensional framework. Both complexes show high stability and good fluorescence in the solid state at room temperature.