| 键长和电子效应共同调控的β-二酮Dy(Ⅲ)配合物的合成、结构与磁性 |
| Syntheses, Structures and Magnetic Properties of β-diketone Dy(Ⅲ) Complexes Tuned by Bond Length and Electronic Effect |
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| 摘要: 以N-乙基-3-吲哚三氟甲基β-二酮（EIFD）为主配体，分别以乙二醇单甲醚（EM）、乙二醇二甲醚（EDM）、二缩三乙二醇（TEG）为辅助配体，与DyCl3·6H2O反应合成了一系列Dy（Ⅲ）配合物[Dy（EIFD）3（EM）]·CH2Cl2（1）、[Dy（EIFD）3（EDM）]·CH2Cl2（2）和[Dy（EIFD）3（TEG）]（3）。X射线单晶衍射分析表明，3个配合物都是八配位的单核结构，配位构型分别为双帽三棱柱、正十二面体和双帽三棱柱，分别具有C2v、D2d和C2v对称性。磁学性质显示了配合物1~3具有慢弛豫现象，能垒分别为95.1 K（1）、40.5 K（2）、53.8和13.4 K（3），且配合物1和3有明显的蝴蝶状磁滞回线。进一步讨论了配合物中Dy—O键长和含氧辅助配体的电子效应对配合物有效翻转能垒的影响。 |
| 关键词: β-二酮 Dy(Ⅲ)配合物 含氧辅助配体 电子效应 键长 |
| 基金项目: 国家自然科学基金青年科学基金（No.21601132，21471051）、黑龙江省教育厅基本科研业务费（No.KYYWF10236180110）、绥化学院第四届科研创新团队（No.SIT04B004）和2018年绥化学院科研启动基金项目（No.SQ18002）资助。 |
| Abstract: A series of 1-(1-ethyl-1H-indol-3-yl)-4,4,4-trifluorobutane-1,3-dione (EIFD) dysprosium complexes, namely[Dy(EIFD)3(EM)]·CH2Cl2 (1),[Dy(EIFD)3(EDM)]·CH2Cl2 (2) and[Dy(EIFD)3(TEG)] (3) (EM=CH3OCH2CH2OH, EDM=CH3OCH2CH2OCH3, TEG=HOCH2CH2OCH2CH2OCH2CH2OH), have been isolated by reactions of EIFD, DyCl3·6H2O and corresponding oxygen-containing auxiliary ligands, respectively. X-ray crystallographic analysis reveals that complexes 1~3 are all eight coordinated mononuclear structures. The coordination geometry for Dy(Ⅲ) ion in complexes 1 and 3 are suggested closer to the biaugmented trigonal prismatic (8-BTP, C2v), in contrast, it is closer to the triangular dodecahedron (8-TDH, D2d) for complex 2. Magnetic studies indicate that all complexes 1~3 exhibit slowed magnetic relaxation with anisotropy energy barriers of 95.1 K for 1, 40.5 K for 2 as well as 53.8 and 13.4 K for 3, respectively. Complexes 1 and 3 showed butterfly-loop. In view of the β-diketone ligand of EIFD, Dy (Ⅲ) complexes with oxygen containing auxiliary ligands displayed higher energy barriers than those of complexes with nitrogen containing auxiliary ligands. The Dy-O bond length and electronic effect of oxygen containing auxiliary ligands in the complexes have been investigated in terms of their anisotropy energy barriers. |
| Keywords: β-diketone Dy(Ⅲ) complex oxygen-containing auxiliary ligand electronic effect bond length |
| 投稿时间：2020-06-20 修订日期：2020-11-01 |
| 摘要点击次数: 1944 |
| 全文下载次数: 1148 |
| 董艳萍,李光明.键长和电子效应共同调控的β-二酮Dy(Ⅲ)配合物的合成、结构与磁性[J].无机化学学报,2021,37(2):213-220. |
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