联苯二甲酸的钐(Ⅲ)配合物的合成、晶体结构及性质研究  

Synthesis,Crystal Structure and Properties of Samarium(Ⅲ)Complex of Diphenic Acid

作　　者：李朋[1] 葛宇 LI Peng;GE Yu(College of Chemistry and Materials Science University,Huaibei Normal University,Huaibei 235099,China)

机构地区：[1]淮北师范大学化学与材料科学学院,安徽淮北235099

出　　处：《宜春学院学报》2023年第9期27-30,共4页Journal of Yichun University

基　　金：淮北师范大学校级课程思政示范课程建设项目(编号:2021zlgc056)。

摘　　要：在水热条件下,将配体2,2’-联苯二甲酸和Sm_(2)O_(3)反应合成了配合物1([Sm(bda)_(1.5)(H_(2)O)])。利用单晶X-射线、元素分析和热重分析对生成的晶体进行了表征和荧光性、热稳定性等性质检测。结果表明,该晶体属于单斜晶系C 2/c空间群的一维链结构。Sm1(Ⅲ)采取八配位的反四棱柱几何构型,而Sm2(Ⅲ)采取八配位的四棱柱几何构型,羧基分别采用μ2-η^(2):η^(1)和μ2-η^(1):η^(1)两种配位模式,bda^(2-)阴离子作为μ3-桥连结Sm(Ⅲ)离子形成1D链结构;进一步,通过π-π和C-H…π堆积作用形成2D和3D结构。配合物1能发出荧光,在141℃以下稳定存在,最终残留物为Sm_(2)O_(3)。Complex 1([Sm(bda)_(1.5)(H_(2)O)])was synthesized by the reaction of ligand 2,2’-biphenyldicarboxylic acid and Sm_(2)O_(3) under hydrothermal conditions.The generated crystals were characterized and their fluorescence,thermal stability,and other properties were tested using single crystal X-ray,elemental analysis,and thermogravimetric analysis.The results show that the crystal belongs to the one-dimensional chain structure of monoclinic crystal system C 2/c space group.Sm1(Ⅲ)adopts an eight coordinated anti quadriprism geometry,while Sm2(Ⅲ)adopts an eight coordinated quadriprism geometry,with carboxyl groups adoptingμ2-η^(2):η^(1) andμ2-η^(1):η^(1) two coordination modes,bda^(2-)anion asμ3-bridged Sm(Ⅲ)ions form 1D chain structures,and further,2D and 3D structures are formed throughπ-πand C-H…πstacking interactions.Complex 1 can emit fluorescence and exists stably below 141℃,with the final residue being Sm_(2)O_(3).

关 键 词：Sm(Ⅲ)配合物 稀土 热稳定性 荧光性质 

分 类 号：O641.4[理学—物理化学]