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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (5): 809-815.DOI: 10.16553/j.cnki.issn1000-985x.2026.0004

• 研究论文 • 上一篇    

2-(3-吡啶基)苯并咪唑-5-羧酸构筑的镍(Ⅱ)配合物结构及磁性质研究

张力杨1(), 冯思思2(), 杜学勤1, 杨冬冬3   

  1. 1.山西药科职业学院药学系,太原 030001
    2.山西大学分子科学研究所化学生物学与分子工程教育部重点实验室,太原 030006
    3.山西大同大学化学与化工学院,大同 037009
  • 收稿日期:2026-01-12 出版日期:2026-05-20 发布日期:2026-06-09
  • 通信作者: 冯思思,博士,教授。E-mail:ssfeng@sxu.edu.cn
  • 作者简介:张力杨(1990—),女,山西省人,博士研究生。E-mail:851085146@qq.com
  • 基金资助:
    国家自然科学基金(22475124)

Structure and Magnetic Properties of a Ni(Ⅱ) Complex Based on 2-(3-Pyridyl) Benzimidazole-5-Carboxylic Acid

ZHANG Liyang1(), FENG Sisi2(), DU Xueqin1, YANG Dongdong3   

  1. 1.Department of Pharmacy,Shanxi Pharmaceutical Vocational College,Taiyuan 030001,China
    2.Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education,Institute of Molecular Science,Shanxi University,Taiyuan 030006,China
    3.School of Chemistry and Environmental Engineering,Shanxi Datong University,Datong 037009,China
  • Received:2026-01-12 Online:2026-05-20 Published:2026-06-09

摘要: 采用溶剂热合成法制备了一种新型二维镍(Ⅱ)配位聚合物[Ni(pbc)2·(H2O)]·2.5H2O (1) [Hpbc=2-(3-吡啶基)苯并咪唑-5-羧酸],通过红外光谱、元素分析和单晶X射线衍射等手段对其结构进行了系统表征。晶体结构分析表明:中心Ni2+ 为六配位模式{NiN2O4},呈现轻微扭曲的八面体几何构型。配体以两种方式参与配位:μ2-κO∶κN和μ2-κO,O'∶κN。去质子化的配体通过不同配位模式分别沿a轴和b轴连接镍离子,形成一维直链和一维锯齿链,两者相互连接,在ab平面内扩展为二维网状结构。该二维网络进一步通过分子间氢键(由未配位的氮、氧原子参与)组装成三维超分子框架。拓扑分析表明,该配合物具有(2,4)-连接的网络结构,其Schläfli符号为{84·122}{8}2。此外,变温磁化率测试显示,该单核镍配合物表现出弱的铁磁耦合特征。

关键词: 2-(3-吡啶基)苯并咪唑-5-羧酸; 镍(Ⅱ)配合物; 磁性; 晶体结构; 溶剂热合成法

Abstract: A new two-dimensional nickel(Ⅱ) coordination polymer [Ni(pbc)2(H2O)]·2.5H2O (1) [Hpbc=2-(3-pyridyl)benzimidazole-5-carboxylic acid] was successfully synthesized using a solvothermal synthesis method. Its chemical composition and structure were systematically characterized by infrared spectroscopy, elemental analysis, and single-crystal X-ray diffraction. The crystal structure analysis reveals that the central Ni2+ is in a six-coordinate {NiN2O4} environment, exhibiting a slightly distorted octahedral geometry. The deprotonated pbc- ligand demonstrates versatile bridging capabilities by coordinating in two distinct modes:μ2-κO∶κN andμ2-κO,O'∶κN. Through these different coordination modes, the ligands connect adjacent nickel ions along thea-axis direction to form one-dimensional straight chains, and along theb-axis direction to form one-dimensional zigzag chains, respectively. These one-dimensional motifs are subsequently interlinked and extended into a coherent two-dimensional layered network within theab plane. This two-dimensional coordination network is further assembled into a three-dimensional supramolecular framework via intermolecular hydrogen bonds, which involve the participation of uncoordinated nitrogen and oxygen atoms from the ligands and the lattice water molecules. Topological analysis of this framework shows that the complex possesses a binodal (2,4)-connected network structure with the Schläfli symbol {84·122}{8}2. In addition, variable-temperature magnetic susceptibility measurements demonstrate weak ferromagnetic coupling characteristics in the mononuclear nickel complex.

Key words: 2-(3-pyridyl)benzimidazole-5-carboxylic acid; Ni(Ⅱ) complex; crystal structure; magnetic property; solvothermal synthesis method

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