| 基于多羧酸烟酸配体的镝、钬、铒和铥配合物的合成及荧光、磁学性质的表征 |
| Synthesis, fluorescence, and magnetic characterization of nicotinic acid ligand-based dysprosium, holmium, erbium, and thulium complexes |
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| 摘要: 以5-（4-羧基苯氧基）烟酸配体（H2cpna）和稀土金属离子Dy3+、Ho3+、Er3+和Tm3+为原料，采用水热法合成了4种稀土金属配合物[M （Hcpna）（cpna）（H2O）3]n，其中M=Dy （1）、Ho （2）、Er （3）、Tm （4）。单晶X射线衍射分析表明配合物1、2、3和4为同构配合物，均为一维链状结构。通过红外、元素分析以及粉末X射线衍射对所得配合物进行了表征，同时对配合物的荧光和磁学性质开展了研究。荧光测试结果表明，配合物1~4的荧光强度均低于配体H2cpna的荧光强度。在2~300 K温度范围内1 kOe直流电场下测试了配合物1~4的磁性，结果表明配合物1、2、3和4的χmT值分别为14.04、14.15、11.08和6.83 cm3·mol-1·K，与文献理论值相符合。 |
| 关键词: 镝 钬 铒 铥 荧光 磁性 |
| 基金项目: 河南省青年骨干教师资助项目（No.2020GGJS180）南阳师范学院培育项目（No.2023PY001）资助。 |
| Abstract: Four isomorphic rare earth complexes[M(Hcpna)(cpna)(H2O)3]n, where M=Dy (1), Ho (2), Er (3), Tm (4), have been synthesized by a solvothermal method based on 5-(4-carboxyphenoxy)nicotinic acid ligand (H2cpna) and rare earth metal ions Dy3+, Ho3+, Er3+, and Tm3+. Single crystal X-ray diffraction analyses reveal that complexes 1, 2, 3, and 4 are isostructural, and the structures are all 1D chain structures. The complexes were characterized by IR, elemental analysis, and powder X-ray diffraction, while the fluorescence and magnetic properties of the complexes were studied. The fluorescence test results show that the fluorescence intensity of complexes 1-4 were all lower than that of the H2cpna ligand. The magnetism of complexes 1-4 were studied in the 2-300 K range at 1 kOe dc field. The χmT values of complexes 1, 2, 3, and 4 were 14.04, 14.15, 11.08, and 6.83 cm3·mol-1·K respectively at room temperature. |
| Keywords: dysprosium（Ⅲ） holmium（Ⅲ） erbium（Ⅲ） thulium（Ⅲ） fluorescence magnetism |
| 投稿时间：2023-05-31 修订日期：2023-09-28 |
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| 于林涛,李奇洋,沈芝,吕文君,赵强.基于多羧酸烟酸配体的镝、钬、铒和铥配合物的合成及荧光、磁学性质的表征[J].无机化学学报,2023,39(11):2181-2187. |
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