| 咪唑-芳香多羧酸金属有机骨架化合物的合成、结构及性质 |
| Syntheses, Structures and Properties of Metal-Organic Frameworks Based on Imidazolyl-Aromatic Multi-Carboxylate Acid Ligands |
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| 摘要: 以5-(1H-咪唑)异酞酸(H2L)为配体,在水热条件下合成了3个金属有机框架化合物:[PrL(HL)(H2O)2]·H2O(1),Er(H0.5L)2(2)和[CoL(H2O)2]·H2O(3)。单晶X-射线衍射测试结果表明,3个化合物都属于单斜晶系,P21/c空间群。化合物1中,Pr3+为九配位,而化合物2和3中,Er3+和Co2+均为六配位。在镧系配合物1和2中,配体中氮原子未参与配位。1为2D折叠形结构,2为3D框架结构。在过渡金属配合物3中,氮原子与Co2+配位,这有助于形成平面二维结构。化合物1和3通过分子间π-π堆积,进一步形成3D结构。3个化合物均展现出较好的热稳定性。 |
| 关键词: 金属有机骨架化合物 过渡金属 镧系元素 水热合成 晶体结构 |
| 基金项目: 国家自然科学基金(No.51173075)资助项目。 |
| Abstract: Three metal-organic frameworks, namely [PrL(HL)(H2O)2]·H2O (1), Er(H0.5L)2 (2), and [CoL(H2O)2]·H2O (3) (H2L=5-(1H-imidazol-1-yl)isophthalic acid), have been synthesized under hydrothermal condition. Single crystal X-ray diffraction indicates that all the three complexes belong to the monoclinic space group P21/c. The Pr3+ ions in 1 are nine-coordinated, while the Er3+ ions in 2 and Co2+ ions in 3 are both six-coordinated. In the lanthanide complex 1 and 2, the nitrogen atom does not coordinate with any metal ions. Complex 1 shows a 2D folding framework, while complex 2 exhibits a 3D network. In the transition metal complex 3, the nitrogen atom coordinates with Co2+, which helps to form a flat 2D framework. Complex 1 and 3 are further packed into 3D framework by the intermolecular π-π interactions. All the three complexes display good thermal stability. |
| Keywords: metal-organic framework transition metal lanthanide hydrothermal synthesis crystal structure |
| 投稿时间：2015-01-27 修订日期：2015-03-27 |
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| 钱岩涛,彭烨栋,章文伟.咪唑-芳香多羧酸金属有机骨架化合物的合成、结构及性质[J].无机化学学报,2015,31(5):857-864. |
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