| 基于2, 5-二甲基苯-1, 4-二亚甲基二膦酸的钴、镍同构化合物的水热合成及晶体结构 |
| Isostructural Transition Metal (Co, Ni) Phosphonates of 2, 5-Dimethylbenzene-1, 4-diylbis(methylene)diphosphonic Acid：Hydrothermal Synthesis and Crystal Structures |
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| 摘要: 在水热条件下，利用2，5-二甲基苯-1，4-二亚甲基二膦酸（H4L）与CoCl2·6H2O或NiSO4·6H2O反应得到2个同构的过渡金属有机膦酸化合物，[Co（H2O）4（H2L）]n（1），[Ni（H2O）4（H2L）]n（2），并用元素分析、红外光谱、粉末及单晶X-射线等方法对其进行了表征。晶体结构分析表明：化合物1和2都属于三斜晶系，空间群为P1，化合物1的晶胞参数为a=0.497 0（2）nm，b=0.711 3（3）nm，c=1.177 8（5）nm，α=97.779（7）°，β=92.103（7）°，γ=107.217（6）°，V=0.3927（3）nm3，Z=2；化合物2的晶胞参数为a=0.494 35（19）nm，b=0.708 9（3）nm，c=1.172 6（5）nm，α=97.919（6）°，β=92.130（6）°，γ=107.441（5）°，V=0.387 0（3）nm3，Z=2.金属离子采取了八面体构型，6个配位氧原子分别来自2个反式构型的H2L配体和4个配位水分子。每1个金属离子与2个反式构型的H2L配体配位形成了一维线型链状结构。这2个化合物最终通过O-H…O氢键作用形成了三维结构。此外，对2个化合物的热稳定性也进行了研究。 |
| 关键词: 钴(Ⅱ) 镍(Ⅱ) 2,5-二甲基苯-1,4-二亚甲基二膦酸 水热合成 晶体结构 |
| 基金项目: 国家自然科学基金（No.21301064）；河南省基础与前沿技术研究（No.132300410413）资助项目。 |
| Abstract: Two new isostructural cobalt and nickel phosphonates [M(H2O)4(H2L)]n, M=Co (compound 1), M=Ni (compound 2) have been hydrothermally synthesized from 2,5-dimethylbenzene-1,4-diylbis(methylene)diphosphonic acid (H4L) and the corresponding metal salts. And the compounds 1 and 2 have been characterized by routine elemental analyses, IR, powder and single-crystal X-ray diffraction methods. Both compounds crystallize in triclinic space group P1 with a=0.497 0(2) nm, b=0.711 3(3) nm, c=1.177 8(5) nm, α=97.779(7)°, β=92.103(7)°, γ=107.217(6)°, V=0.3927(3) nm3 and Z=2 for 1, a=0.494 35(19) nm, b=0.708 9(3) nm, c=1.172 6(5) nm, α=97.919(6)°, β=92.130(6)°, γ=107.441(5)°, V=0.387 0(3) nm3 and Z=2 for 2. Metal ion have all octahedral geometry coordinated to six oxygen atom from two trans-H2L ligands and four coordinated water molecules. Each metal ion is coordinated to two trans-H2L ligands thereby generating an infinite one-dimensional (1D) linear chain. Finally, all the compounds show three-dimensional (3D) network through O-H…O hydrogen bonds. Thermal stability of compounds 1 and 2 have also been investigated. CCDC: 934867, 1; 935051, 2. |
| Keywords: cobalt(Ⅱ) nickel(Ⅱ) 2,5-dimethylbenzene-1,4-diylbis(methylene)diphosphonic acid hydrothermal synthesis crystal structure |
| 投稿时间：2013-12-08 修订日期：2014-02-10 |
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| 张爱江,陈长娟.基于2, 5-二甲基苯-1, 4-二亚甲基二膦酸的钴、镍同构化合物的水热合成及晶体结构[J].无机化学学报,2014,30(7):1712-1718. |
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