二价金属镍磁性配合物的合成、单晶结构及磁性研究  

Synthesis,Single Crystal Structure,and Magnetic Study of Divalent Metal Nickel Magnetic Complex

作　　者：安燕燕 郭婷婷 边建红 赵丹 闫娟枝[1] AN Yanyan;GUO Tingting;BIAN Jianhong;ZHAO Dan;YAN Juanzhi(Department of Materials and Chemical Engineering,Taiyuan University,Taiyuan 030032,China)

机构地区：[1]太原学院材料与化学工程系,太原030032

出　　处：《人工晶体学报》2024年第10期1784-1790,共7页Journal of Synthetic Crystals

基　　金：山西省基础研究计划项目(202303021212356);山西省高等学校科技创新项目(2022L583);山西省高等学校教学改革创新项目(J20221201)。

摘　　要：本文以5-((4-羧基苯氧基)-甲基)间苯二甲酸(H_(3)L)为含氧主配体,通过含N辅配体1,4-二(1H-咪唑-1-基)苯(1,4-bib)的配位,与Ni(II)离子在水热条件下反应合成了一例具有三维框架结构的配合物[Ni_(3)(L^(3-))2(1,4-bib)_(4)(H_(2)O)_(2)]·5H_(2)O(1)。通过单晶X射线衍射、粉末X射线衍射和元素分析对配合物1的结构进行了表征。配合物1结晶于三斜晶系P-1空间群,其晶体学参数:a=1.2605(7)nm,b=1.3491(7)nm,c=1.3648(7)nm,α=111.913(8)°,β=117.251(7)°,γ=90.732(8)°,V=1.8662(18)nm^(3),Z=1,M_(r)=1769.66,F(000)=916,μ=0.84 mm^(-1),D_(c)=1.575 mg·m^(-3),S=1.06,R_(1)=0.056,wR_(2)=0.159。半刚性三羧酸配体L^(3-)和刚性1,4-bib的共同贡献构筑了可预测的高维结构,Ni离子通过N、O原子的配位及配体的结构延伸促使配合物1形成三维网络。此外,研究了含单d电子中心Ni(II)配合物的磁性能:配合物1中羧基仅与一个阳离子结合,导致固体中的磁性由金属单离子行为决定。配合物1的变温磁化率χ_(m)T可以通过零场分裂来描述。The synthesis of a novel complex[Ni_(3)(L^(3-))2(1,4-bib)_(4)(H_(2)O)_(2)]·5H_(2)O(1)with three-dimensional framework structure was achieved through a hydrothermal reaction,employing 5-((4-carboxylphenoxy)-methyl)isophthalic acid(H_(3)L)as the main oxygen-containing ligand,complemented by the N-donor ligand 1,4-bis(1H-imidazol-1-yl)benzene(1,4-bib),and Ni(II)ions.The structure of complex 1 was characterized by single crystal X-ray diffraction,powder X-ray diffraction,and elemental analysis.Complex 1 is crystallized in the triclinic crystal system of P-1 space group,and its crystallographic parameters are a=1.2605(7)nm,b=1.3491(7)nm,c=1.3648(7)nm,α=111.913(8)°,β=117.251(7)°,γ=90.732(8)°,V=1.8662(18)nm^(3),Z=1,M_(r)=1769.66,F(000)=916,μ=0.84 mm^(-1),D_(c)=1.575 mg·m^(-3),S=1.06,R_(1)=0.056,wR_(2)=0.159.The joint contribution of semi-rigid tricarboxylic acid ligand L^(3-),rigid 1,4-bib and also with Ni(II)ion to form a predictable high-dimensional structure.Complex 1 is a three-dimensional network constructed through the coordination of N and O atoms with Ni ion and the structural extension of the ligand.In addition,the magnetic properties of Ni(II)compound containing single d electron center were studied:the carboxyl group in mononuclear complex 1 only binds to one cation,resulting in magnetism in the solid being determined by the behavior of single metal ions.Variable temperature magnetic susceptibility ofχ_(m)T in complex 1 can be described by zero field splitting.

关 键 词：Ni(II)离子 配合物 晶体结构 三维框架结构 磁性 

分 类 号：O641.4[理学—物理化学]