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基于5-硝基间苯二甲酸配体的六核Co(Ⅱ)配合物的合成、结构及磁性
Synthesis,Structures and Magnetic Properties of Hexanuclear Co(Ⅱ) Coordination Compounds Based on 5-Nitroisophthalic Acid Ligand
【摘要】 以5-硝基间苯二甲酸(H2nip)作为主配体、4,4’-二吡啶胺(dpa)为辅助配体,在不同溶剂中合成了2种Co(Ⅱ)配合物{[Co3(μ3-OH)(μ2-OH)(nip)2(dpa)(MeOH)(H2O)]·2H2O}n(1)和{[Co3(μ3-OH)2(nip)2(dpa)(EtOH)(H2O)]·2H2O}n(2)。采用单晶X射线衍射、红外光谱(IR)、元素分析等方法对两种配合物进行了表征。结构分析表明两种配合物均为基于六核钴簇的三维框架结构,但不同的溶剂分子配位导致二者具有不同的拓扑结构,表明溶剂对配合物结构有重要影响。磁学研究显示该两种配合物均为反铁磁行为。
【Abstract】 With 5-nitroisophthalic acid( H2nip) as primary ligand and 4,4’-dipyridylamine( dpa) as auxiliary ligand,two new Co( Ⅱ)-based coordination compounds,namely { [Co3(μ3-OH)( μ2-OH)( nip)2( dpa)( MeOH)( H2O) ]·2H2O}n(1)and { [Co3( μ3-OH)2( nip)2( dpa)( EtOH)( H2O) ]·2H2O}n( 2),were hydrothermally synthesized in different solvents and characterized by single-crystal X-ray diffraction,elemental analyses,infrared spectra and powder X-ray diffraction. Both of them exhibit three-dimensional framework based on hexanuclear cobalt clusters with different topological structures caused by the coordination of distinct solvents,which indicates the important influence of solvents on the structures of coordination compounds. Magnetic studies reveal antiferromagnetic behaviors both for 1 and 2.
【Key words】 coordination compound; 5-nitroisophthalic acid; Cobalt(Ⅱ) ion; magnetism;
- 【文献出处】 人工晶体学报 ,Journal of Synthetic Crystals , 编辑部邮箱 ,2019年11期
- 【分类号】O641.4
- 【被引频次】4
- 【下载频次】152