| 基于水杨醛类席夫碱构筑的Fe(III)、Co(III)、混价Mn(II)/Mn(III)配合物的合成、晶体结构及磁性研究 |
| Synthesis, Crystal Structure and Magnetic Property of Fe(III) and Co(III)、mixed valence Mn(II)/Mn(III) Complexes Based on a Schiff Base Ligand Derived From Salicylaldehyde |
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| 摘要: 以3-甲氧基水杨醛与乙醇胺缩合得到席夫碱化合物hmmpH2(hmmpH2 = 2-[(2-羟乙基亚氨基)甲基]-6-甲氧基苯酚),以hmmpH2为配体合成了配合物[Fe2(hmmp)4].1.5CH3CN.0.5H2O(1)和 [Co2((hmmp)2(N3)2(CH3OH)2].CH3ONa (2)。以3,5-二溴水杨醛与乙醇胺缩合得到配合物hmdbrpH2(hmdbrpH2= 2-[(2-羟乙基亚氨基)甲基]-4,6-二溴苯酚),以hmdbrpH2 为配体合成了一个混价三核配合物[MnIIMnIII2(hmdbrp)2(O2CPh)4(CH3OH)2].CH3CN.CH3OH (3)(HO2CPh为苯甲酸)。对三个配合物进行了元素分析、X-射线单晶衍射分析, 对配合物(1)和(3)进行了磁性研究。单晶结构分析表明配合物(1)中两个六配位的Fe(III)离子通过两个醇羟基氧原子相连形成二聚体结构,配合物(2)中Co(III)也为六配位,通过两个甲醇中氧原子相连形成双核结构,配合物(3)为一混价三核锰结构,三个Mn离子呈线性排列。磁性测试表明配合物(1)中Fe(III)离子之间存在反铁磁相互作用,配合物(3)的三核锰单元内的Mn(II)、Mn(III)离子之间存在反铁磁相互作用。 |
| 关键词: 席夫碱 混价 晶体结构 磁性 |
| 基金项目: 省自然科学基金 |
| Abstract: The hmmpH2 schiff base (hmmpH2=2-[(2-hydroxyethylimino)methyl]- 6-methoxyphenol) was synthesized by O-vanillin and ethanolamine. Complexes [Fe2(hmmp)4].CH3OH.CH3CN.H2O(1) and [Co2((hmmp)2(N3)2(CH3OH)2].CH3ONa (2) were synthesized by hmmpH2 ligand. The hmdbrpH2 schiff base (hmdbrpH2=2-[(2-hydroxyethylimino)methyl]-4,6-dibromophenol) was synthesized by 3,5-dibromosalicylaldehyde and ethanolamine. Complex [MnIIMnIII2(hmdbrp)2(O2CPh)4(CH3OH)2].CH3CN.CH3OH(3) was synthesized by hmdbrpH2 ligand. These complexes were fully characterized by elemental analysis and X-ray single crystal diffraction. Compex (1) and (3) were studied by magnetic investigation. The structural analysis indicates that in complex (1), two six-coordinated Fe(III) ions are bridged by two alcoholic hydroxyl atoms to form a dimer structure. In complex (2), Co(III) is six-coordination with an octahedral coordination environment and the two Co(III) ions are bridged by two Oatoms from CH3OH constructing a binuclear complex. The complex (3) is a mixed valence trinuclear structure, with three Mn ions in linear array. Magnetic study indicates that the antiferromagnetic interaction exist between Fe(III) ions in complex (1), in complex (3) antiferromagnetic interactions exist between the Mn(II) and Mn(III) ions in the trinuclear mangansene unit. |
| Keywords: schiff base mixed valence crystal structure magnetic property |
| 投稿时间：2016-12-12 修订日期：2017-02-27 |
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