| 基于二氰根铬的一系列氰根桥联CrⅢ-CuⅡ-CrⅢ三核配合物的合成、结构与磁性 |
| Syntheses, Crystal Structures and Magnetic Properties of a Series of Cyanide-Bridged Trinuclear Cr(Ⅲ)-Cu(Ⅱ)-Cr(Ⅲ) Complexes Based on Dicyanidechromate(Ⅲ) Building Blocks |
|
| 摘要: 基于一系列二氰根铬与[Cu(cyclam)](ClO4)2反应合成了3个氰根桥联CrⅢ-CuⅡ-CrⅢ三核配合物[Cu(cyclam)][Cr(bpmb)(CN)2]2·4H2O(1)(cyclam=1,4,8,11-四氮杂环十四烷,bpmb2-=1,2-二(2-吡啶甲酰胺基)-4-甲基苯),[Cu(cyclam)][Cr(bpdmb)(CN)2]2(2)(bpdmb2-=1,2-二(2-吡啶甲酰胺基)-4,5-二甲基苯)和[Cu(cyclam)][Cr(bpClb)(CN)2]2·4H2O(3)(bpClb2-=1,2-二(2-吡啶甲酰胺基)-4-氯苯)。单晶衍射结果表明:3个化合物是结构类似的中性三核配合物,均含有氰根桥联的Cr(Ⅲ)-CN-Cu(Ⅱ)-NC-Cr(Ⅲ)连接;磁性研究表明:氰根桥在CrⅢ和CuⅡ离子间传递弱的铁磁耦合作用,基于自旋哈密顿算符Ĥ=-2JCrCuŜCu(ŜCr1+ŜCr2)拟合得到它们的磁耦合常数分别是JCrCu=1.53(2)cm-1(1),0.45(1)cm-1(2)和0.73(2)cm-1(3)。 |
| 关键词: 氰根桥联 晶体结构 磁性 杂金属 |
| 基金项目: 江苏省高校优势学科建设工程项目和中央高校基本科研业务费专项资金(No.2015XKMS047)资助。 |
| Abstract: Three cyanide-bridged trinuclear chromate(Ⅲ)-copper(Ⅱ)-chromate(Ⅲ) complexes [Cu(cyclam)][Cr(bpmb)(CN)2]2·4H2O(1)(cyclam=1, 4, 8, 11-tetraazacyclotetradecane and bpmb2-=1, 2-bis(pyridine-2-carboxamido)-4-meth-ylbenzenate), [Cu(cyclam)][Cr(bpdmb)(CN)2]2(2)(bpdmb2-=1, 2-bis(pyridine-2-carboxamido)-4, 5-dimethylbenzenate) and [Cu(cyclam)][Cr(bpClb)(CN)2]2·4H2O(3)(bpClb2-=1, 2-bis(pyridine-2-carboxamido)-4-chlorobenzenate), have been synthesized by the reaction of [Cu(cyclam)](ClO4)2 with a series of dicyanidechromate(Ⅲ) building blocks.Single crystal X-ray diffraction analyses show that complexes 1~3 have similar neutral trinuclear structures with Cr(Ⅲ)-CN-Cu(Ⅱ)-NC-Cr(Ⅲ) linkages.Magnetic investigations indicate that complexes 1~3 exhibit weak ferromagnetic coupling between Cr(Ⅲ) and Cu(Ⅱ) centers through the cyanide bridge with JCrCu=1.53(2) cm-1 for 1, 0.45(1) cm-1 for 2 and 0.73(2) cm-1 for 3 based on the spin exchange Hamiltonian Ĥ=-2JCrCuŜCu(ŜCr1+ŜCr2).CCDC:1444524, 1; 1444525, 2; 1444526, 3. |
| Keywords: cyanide-bridged crystal structure magnetic property heterometallic |
| 投稿时间：2015-12-29 修订日期：2016-03-02 |
| 摘要点击次数: 1925 |
| 全文下载次数: 2012 |
| 张丽芳,韩方方,杨代胜,陈会,倪中海.基于二氰根铬的一系列氰根桥联CrⅢ-CuⅡ-CrⅢ三核配合物的合成、结构与磁性[J].无机化学学报,2016,32(4):731-737. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
