两个一维之字链异三金属配位聚合物的合成、结构和磁性
Syntheses, Crystal Structures and Magnetic Properties of Two One-Dimensional Heterotrimetallic Coordination Polymers
作者单位E-mail
刘杨 河北工业大学化工学院, 天津 300130  
王振平 河北工业大学化工学院, 天津 300130  
王庆伦 南开大学化学学院, 天津 300071 ychun@hebut.edu.cn 
仝玉章 南开大学化学学院, 天津 300071  
杨春 河北工业大学化工学院, 天津 300130 wangql@nankai.edu.cn 
摘要: 用分步合成法得到了2个结构新颖的一维之字链异三金属配位聚合物{[Cu(Me2valpn)Dy(DMF)2(H2O)Fe(CN)6]·1.5H2O·0.5CH3OH}n1)和{[Cu(Me2valpn)Tb(DMF)2(H2O)Fe(CN)6]·H2O·CH3OH}n2)(H2Me2valpn=N,N'-双(3-甲氧基-水杨醛)缩-2,2-二甲基-1,3-丙二胺)。X射线单晶衍射分析表明每个[Fe(CN)6]3-用顺式的2个氰根分别连接2个相邻构筑单元[Cu(Me2valpn)Ln(DMF)2(H2O)]3+的Cu(II)和Ln(III)。除了Cu(II)和Ln(III)之间的双酚氧桥之外,链中还包含Fe-C≡N-Cu和Fe-C≡N-Ln两类弯曲的桥联结构。配合物1在9.5~300 K的直流变温磁化率数据符合居里-韦斯定律,韦斯常数(θ)为13.17 K,表明配合物1总体上表现铁磁相互作用。交流磁化率测试表明配合物1没有表现出缓慢磁弛豫现象。
关键词: 隔室席夫碱  异三金属配合物  配位聚合物  晶体结构  磁性
基金项目: 国家自然科学基金(No.21771111,21601092,21371104)和河北省自然科学基金(No.B2016202280)资助项目。
Abstract: Two novel heterotrimetallic 1D zigzag chain coordination polymers, {[Cu(Me2valpn)Dy(DMF)2(H2O)Fe(CN)6]·1.5H2O·0.5CH3OH}n (1) and {[Cu(Me2valpn) Tb(DMF)2(H2O)Fe(CN)6]·H2O·CH3OH}n (2) (H2Me2valpn=N,N'-bis(3-methoxysalicylidene)-2,2-dimethyl-1,3-diaminopropane), were prepared by stepwise synthetic approach. Single -crystal X-ray diffraction analysis revealed that each[Fe(CN)6]3- is connected with two[Cu(Me2valpn)]Ln(DMF)2(H2O)]3+ fragments in a cis-mode. Accordingly, there are two types of bent bridging linkages (Fe-C≡N-Cu and Fe-C≡N-Ln) in the chain besides the diphenoxo bridges between Cu(II) and Ln(III). In the temperature range of 9.5~300 K, the dc magnetic susceptibilities of complex 1 are consistent with the Curie-Weiss law and give positive Curie-Weiss constants (θ=13.17 K), indicating the presence of predominant ferromagnetic interactions. The AC magnetic measurements reveal that complex 1 shows no slow magnetization relaxation.
Keywords: compartmental Schiff base  heterotrimetallic complex  coordination polymer  crystal structure  magnetic property
投稿时间:2018-02-09 修订日期:2018-05-11
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刘杨,王振平,王庆伦,仝玉章,杨春.两个一维之字链异三金属配位聚合物的合成、结构和磁性[J].无机化学学报,2018,34(8):1448-1454.
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