膦酸桥联锰席夫碱化合物的合成、晶体结构及磁性质  

Phosphonate Bridged Mn^(Ⅲ)-Schiff Base Compound:Synthesis,Structure and Magnetic Properties

作　　者：徐艳[1] XU Yan(Department of Materials Engineering,Institute of Information Engineering,Suqian University,Suqian 223800,China)

机构地区：[1]宿迁学院信息工程学院材料工程系,江苏宿迁223800

出　　处：《化学试剂》2021年第11期1575-1579,共5页Chemical Reagents

基　　金：宿迁市科技计划项目(K201911);宿迁学院校级第二批科研平台项目(2021pt04);宿迁学院校级第二批科研创新团队项目(2021td01)。

摘　　要：利用溶剂挥发法合成了基于膦酸桥联的新颖Mn^(Ⅲ)席夫碱三核化合物{[Mn(salen)]_(3)(L)}ClO_(4)(salen^(2-)=乙二胺缩双水杨醛,H_2L=5-羧酸-1-萘膦酸),并采用单晶X-射线衍射、元素分析、红外光谱、粉末X-射线衍射表征了化合物的结构。Mn^Ⅲ席夫碱三核化合物的不对称单元中含有一个{[Mn(salen)]_(3)(L)}^(+)三核单元,这些三核单元由来自膦酸配体的O-P-O基团桥联3个Mn^Ⅲ离子中心形成,另外晶体结构中还有一个无序的ClO_(4)^(-)作为平衡阴离子。这些{[Mn(salen)]_(3)(L)}^(+)三核单元之间通过π-π相互作用形成一维超分子链。Mn^(Ⅲ)席夫碱三核化合物的磁性研究表明Mn^Ⅲ离子之间存在反铁磁相互作用。A new trinuclear compound consisting of Mn^(Ⅲ)-Schiff base building block bridged by O-P-O units,namely,{[Mn(salen)]_(3)(L)}ClO_(4)(saleN_(2)-=N,N′-(ethylene)bis-(salicylideneiminato),H_(2)L=5-(ethoxycarbonyl-naphthalen-1-yl)phosphonic acid),was synthesized by using solvent evaporation and characterized by single crystal X-ray crystallographic analysis.Mn^(Ⅲ)-Schiff base compound showed trinuclear structure{[Mn(salen)]3(L)}^(+),in which O-P-O groups among the phosphonate ligand bridge three Mn^(Ⅲ)ions centers,and an additional disordered ClO_(4)^(-) as a balance anion.These{[Mn(salen)]_(3)(L)}(+)trimers were assembled byπ-πinteraction from the neighboring compounds,giving rise to supramolecular one-dimensional chain.Magnetic measurements of Mn^(Ⅲ)-Schiff base the compound indicated that dominant antiferromagnetic interactions were mediated between the Mn^(Ⅲ)ions centers.

关 键 词：锰 席夫碱 膦酸 晶体结构 磁性质 

分 类 号：O641.4[理学—物理化学]