【摘要】 合成并表征了1D链状配位聚合物[Mn（3,5-busalmen）(μ_1,5-dca)]_n·2n CH₃CN（1）和同时具有3种Mn（Ⅲ）配位单元的配合物[Mn（5-Clsalmen）（H₂O）（dca）]_0.5[Mn（5-Clsalmen）（H₂O）Cl]_0.25{[Mn（5-Clsalmen）（H₂O）]（dca）}_0.25·1.5H₂O（2）. X-射线单晶衍射分析表明,配合物1为由μ_1,5-dca桥联的一维之字链结构,配合物2包含2种六配位和一种五配位的Mn（Ⅲ）配位单元,而且单核Mn（Ⅲ）配位单元通过分子间氢键形成二聚体结构.磁性研究表明,配合物1和2中Mn（Ⅲ）离子分别通过桥联配体dca和分子间氢键传递弱的反铁磁相互作用.变场研究表明,配合物1可能在2 K时表现自旋翻转行为(H_SF=2 T).更多还原

【Abstract】 Coordination polymer [Mn（3,5-busalmen）(μ_1,5-dca)]_n ·2 n CH₃ CN（1） and mononuclear complex[Mn（5-Clsalmen）（H₂ O）（dca）]_0.5[Mn（5-Clsalmen）（H₂ O）Cl]_0.25{[Mn（5-Clsalmen）（H₂ O）]（dca）}_0.25 ·1.5 H₂ O（2） were synthesized and characterized. X-Ray diffraction analyses revealed that complex 1 has a one dimensional zig-zag chain structure constructed by μ_1,5-dca bridge and that complex 2 comprises two hexacoordinate and one pentacoordinate Mn（Ⅲ） ions and dimeric structures were formed by intermolecular hydrogen bonding interactions between the mononuclear Mn（Ⅲ） units. Magnetic susceptibility measurements indicates the presence of antiferromagnetic interactions between intra-chain and intra-dimer high-spin Mn（Ⅲ） ions via the dca bridge and hydrogen bonding in complexes 1 and 2, respectively. Field dependence of magnetization revealed that complex 1 may exhibit spin-flop transition at 2 K with the critical field H_SF=2.0 T.更多还原