摘要
合成并表征了1D链状配位聚合物[Mn(3,5-busalmen)(μ1,5-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μ1,5-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(HSF=2 T).
Coordination polymer[Mn(3,5-busalmen)(μ1,5-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 byμ1,5-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 HSF=2.0 T.
作者
王亚旭
陈曦
仝玉章
王庆伦
王振平
杨春
Wang Yaxu;Chen Xi;Tong Yuzhang;Wang Qinglun;Wang Zhenping;Yang Chun(School of Chemical Engineering and Technology,Hebei University of Technology, Tianjin 300130, China;College of Chemistry,Nankai University, Tianjin 300071, China;School of Environmental Science and Engineering,Hebei University of Science and Technology, Shijiazhuang 050018, China)
出处
《南开大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第4期21-28,共8页
Acta Scientiarum Naturalium Universitatis Nankaiensis
基金
国家自然科学基金(21771111,21601092,21371104)
河北省自然科学基金(B2016202280)
关键词
席夫碱
Mn(Ⅲ)配合物
二氰胺
晶体结构
磁性
Schiff base
Mn(Ⅲ)complex
dicyanamide
crystal structure
magnetic properties
