基于席夫碱配体和两种苯甲酸盐构筑的两例Dy_(4)配合物的合成、结构及单分子磁体性质  

Two Dy_(4) complexes based on a Schiff base ligand and two benzoates:Synthesis,structures,and single-molecule magnetic properties

作　　者：李大伟 胡瑞 师素云[3] 涉叶叶 张夏梅 李亚红[1] 张义权[2] 姚金雷 LI Dawei;HU Rui;SHI Suyun;SHE Yeye;ZHANG Xiamei;LI Yahong;ZHANG Yiquan;YAO Jinlei(College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou,Jiangsu 215123,China;Jiangsu Key Laboratory for NSLSCS,School of Physical Science and Technology,Nanjing Normal University,Nanjing 210023,China;Henan College of Transportation,Zhengzhou 451460,China;Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application,School of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou,Jiangsu 215009,China)

机构地区：[1]苏州大学材料与化学化工学部,苏州215123 [2]南京师范大学物理科学与技术学院,江苏省NSLSCS重点实验室,南京210023 [3]河南交通职业技术学院,郑州451460 [4]苏州科技大学物理科学与技术学院,江苏省微纳热流技术与能源应用重点实验室,苏州215009

出　　处：《无机化学学报》2024年第2期307-315,共9页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.22171198,21772140,21771136,21973046);苏州市科技基础设施项目(No.SZS062201905);江苏省高等学校优势学科建设项目(No.BK20171213)资助。

摘　　要：使用Dy(NO_(3))_(3)·6H_(2)O与席夫碱配体2-(((2-羟基-3-甲氧基苄基)亚氨基)甲基)-4-甲氧基苯酚(H_(2)L)和2个辅助配体PhCO_(2)H和2-NO_(2)-PhCO_(2)H在乙醇中反应,得到2例Dy_(4)配合物[Dy_(4)(L)_(4)(PhCO_(2))_(2)(NO_(3))_(2)(EtOH)_(2)](1)和[Dy_(4)(L)_(4)(2-NO_(2)-PhCO_(2))_(2)(NO_(3))_(2)(EtOH)2](2)。单晶X射线衍射解析表明配合物1和2均由Dy_(2)基本单元构建,形成中心对称的四核线性链状结构。配合物1和2中Dy_(2)单元中的一个Dy(Ⅲ)离子呈现七配位几何构型,另一个Dy(Ⅲ)离子呈现八配位几何构型。2例配合物均为单分子磁体,其能垒分别为110和108 K。通过理论计算对1和2的磁性能进行了分析。Two Dy_(4) clusters with the formulae[Dy_(4)(L)_(4)(PhCO_(2))_(2)(NO_(3))_(2)(EtOH)_(2)](1)and[Dy_(4)(L)_(4)(2-NO_(2)-PhCO_(2))_(2)(NO_(3))_(2)(EtOH)_(2)](2)were obtained by the reactions of Dy(NO_(3))_(3)·6H_(2)O with a Schiff base ligand 2-(((2-hydroxy-3-methoxybenzyl)imino)methyl)-4-methoxyphenol(H2L)and two auxiliary ligands PhCO_(2)H and 2-NO_(2)-PhCO_(2)H in ethanol.Single crystal X-ray diffraction studies evidenced that the two complexes are constructed from Dy_(2) units,and display a centrosymmetric tetranuclear linear chain structure.One metal center in the Dy_(2) unit in 1 and 2 presents a sevencoordinated geometry,and the other Dyion displays an eight-coordinated geometry.Both complexes are identified as single-molecule magnets with energy barriers of 110 and 108 K,respectively.Theoretical calculations also analyzed the magnetic properties of 1 and 2.

关 键 词：席夫碱 单分子磁体 四核 完全活性空间自洽场 

分 类 号：O614.342[理学—无机化学]