| 氰根桥联大环配合物的合成、结构与磁性研究 | |
| 倪中海 ; 张丽芳 ; 崔爱莉 ; 寇会忠 ; NI ZhongHai ; ZHANG LiFang ; CUI AiLi ; KOU HuiZhong | |
| 2010-06-10 ; 2010-06-10 | |
| 关键词 | 多核配合物 单晶结构 磁性 氰根 polynuclear complex,crystal structure,magnetic property,cyanide,chromium,manganese O641.4 |
| 其他题名 | Synthesis,crystal structures and magnetic properties of cyanide-bridged macrocyclic complexes |
| 中文摘要 | 合成了三个氰根桥联的十二核大环齿轮状配合物[Cr(bpmb)(CN)2]6-[Mn(5-Brsalpn)]6·12H2O(1)、[Co(bpmb)(CN)2]6[Mn(5-Brsalpn)]6·12H2O(2)和[Co(bpmb)-(CN)2]6[Mn(5-Clsalpn)]6·24H2O·8CH3CN(3)(bpmb2-=1,2-bis(pyridine-2-carboxamido)-4-methylbenzenate),表征了其晶体结构和磁性.三配合物是同晶型的,包含交替排列的锰(Ⅲ)-Schiff碱阳离子和[M(bpmb)(CN)2]-阴离子,阴阳离子单元用氰根离子连成十二核环状结构.分子环直径约2nm.配合物1呈反铁磁性,说明通过氰根桥铬(Ⅲ)-锰(Ⅲ)离子间存在反铁磁相互作用.基于一维交替链模型(哈密顿算符H=-JCrMn∑N i=0 si·S i+1)导出的磁化率公式与实验数据进行拟和得到磁耦合参数JCrMn=-2.65(6)cm-1.; Three cyanide-bridged dodecanuclear macrocyclic wheel-like complexes Cr(bpmb)(CN)2]6[Mn(5-Brsalpn)]6·12H2O(1),[Co(bpmb)(CN)2]6[Mn(5-Brsalpn)]6·12H2O(2) and [Co(bpmb)(CN)2]6[Mn(5-Clsalpn)]6·24H2O·8CH3CN(3)[bpmb2-=1,2-bis(pyridine-2-carboxamido)-4-methylbenzenate] have been synthesized and their crystal structures and magnetic properties have been investigated.The three compounds are structurally isomorphous which consist of alternating Mn(Ⅲ)-Schiff base cations and [M(bpmb)(CN)2]- anions,generating cyanide-bridged nanosized dodecanuclear macrocyclic structures with the approximate diameter of 2 nm.The study on the magnetic property of complex 1 reveals the antiferromagnetic interaction between the Cr(Ⅲ) and Mn(Ⅲ) ions through the cyanide bridges.A best-fit to the magnetic susceptibily of the complex leads to the magnetic coupling constant of JCrMn = -2.65(6) cm-1 on the basis of one-dimensional alternating chain model with Hamiltonian H=-JCrMn∑N i=0 si·S i+1; 国家自然科学基金(批准号:50873053,20671055); 国家重点基础研究发展计划(编号:2009CB623301); 中国博士后基金(200801414)资助 |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/61045]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 倪中海,张丽芳,崔爱莉,等. 氰根桥联大环配合物的合成、结构与磁性研究[J],2010, 2010. |
| APA | 倪中海.,张丽芳.,崔爱莉.,寇会忠.,NI ZhongHai.,...&KOU HuiZhong.(2010).氰根桥联大环配合物的合成、结构与磁性研究.. |
| MLA | 倪中海,et al."氰根桥联大环配合物的合成、结构与磁性研究".(2010). |
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