| 基于有机羧酸配体的Co(Ⅲ)/Cu(Ⅱ)配合物的合成、结构及表征 |
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| 引用本文： | 保玉婷,李海朝,马琴,孙赞.基于有机羧酸配体的Co(Ⅲ)/Cu(Ⅱ)配合物的合成、结构及表征[J].人工晶体学报,2021,50(11):2129-2137. |
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| 作者姓名： | 保玉婷 李海朝 马琴 孙赞 |
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| 作者单位： | 1.青海民族大学化学化工学院,西宁 810007;2.青藏高原资源化学与生态环境保护国家民委重点实验室,西宁 810007;3.青海民族大学实验室与设备管理中心,西宁 810007 |
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| 基金项目： | 青海省自然科学基金(2020-ZJ-964Q);青海民族大学高层次人才科研项目(2018XJG02) |
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| 摘 要： | 在溶剂热条件下,以含卤素有机羧酸3-溴-吡啶-2,6-二甲酸(H2L)为配体,以硝酸钴、硝酸铜为金属源,合成了两例配合物:Co(L′)3](1)和Cu(L′)2]n(2)(HL′=5-溴-吡啶-2-甲酸),通过元素分析(EA)、X射线单晶衍射(SXRD)、X射线粉末衍射(PXRD)、红外光谱(IR)和热重分析(TGA)进行结构表征。X射线单晶衍射结果表明,配体H2L在反应过程中发生脱羧现象,生成单羧酸配体5-溴-吡啶-2-甲酸。在配合物1中,每个Co(Ⅲ)都位于略微扭曲的八面体几何构型中,不对称单元中含有两个单核单元,单核单元通过C—H…O氢键形成三维超分子结构。配合物2的不对称单元中含有一个Cu(Ⅱ),两个脱质子的L′-配体,每个Cu(Ⅱ)都是六配位的,位于扭曲的八面体几何构型中。Cu(Ⅱ)由配体连接生成1D链结构,通过C—H…O氢键形成三维超分子结构。此外,研究了两例配合物的热稳定性能。
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| 关 键 词： | 溶剂热合成 有机羧酸配体 钴配合物 铜配合物 晶体结构 脱羧 |
Synthesis,Structure and Characterization of Co(Ⅲ)/Cu(Ⅱ) Complexes Based on Organic Carboxylic Acid Ligands |
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| BAO Yuting,LI Haichao,MA Qin,SUN Zan.Synthesis,Structure and Characterization of Co(Ⅲ)/Cu(Ⅱ) Complexes Based on Organic Carboxylic Acid Ligands[J].Journal of Synthetic Crystals,2021,50(11):2129-2137. |
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| Authors: | BAO Yuting LI Haichao MA Qin SUN Zan |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Qinghai Minzu University, Xining 810007, China;2. Key Laboratory of Resource Chemistry and Eco-environmental Protection in Qinghai-Tibet Plateau (Qinghai Minzu University), State Ethnic Affairs Commission, Xining 810007, China;3. Lab and Equipment Management, Qinghai Minzu University, Xining 810007, China |
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| Abstract: | Two novel complexes, namely Co(L′)3] (1) and Cu(L′)2]n (2) (HL′=5-bromopyridine-2-carboxylic acid), were obtained under solvothermal conditions by the assembly process of organic carboxylate ligand containing halogen (3-bromopyridine-2,6-dicarboxylic acid, H2L) and Co(NO3)2·6H2O or Cu(NO3)2·3H2O respectively, and characterized by element analysis (EA), X-ray single diffraction (SXRD), X-ray powder diffraction (PXRD), infrared spectroscopy (IR) and thermogravimetric analysis (TGA). The single crystal X-ray diffraction reveals that ligand H2L transform to HL′ during a decarboxylation process. In the asymmetric unit of 1, there are two mononuclear units. In each unit, central Co(Ⅲ) ion is in a slightly distorted octahedron. Complex 1 shows mononuclear structure, forming a three-dimensional (3D) supramolecular structure via C—H…O hydrogen bonding interactions. The asymmetric unit of 2 contains one central Cu atom and two L′- ligands. In each unit, central Cu(Ⅱ) ion is in a slightly distorted octahedron. Complex 2 exhibits 1D chain structure, forming a three-dimensional (3D) supramolecular structure via C—H…O hydrogen bonding interactions. Furthermore, the stability property of complexes 1 and 2 was also investigated. |
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| Keywords: | solvothermal synthesis organic carboxylic acid ligand Co complex Cu complex crystal structure decarboxylation |
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