Syntheses, Structures, and Magnetic Properties of Mixed-ligand Complexes of Co(II) Based on N-Heterocyclic and Different Carboxylate Ligands

  • Yubo Xing
  • Yuqi LiuEmail author
  • Binfang Meng
  • Xiaofei Xue
  • Xinying Wang
  • Wei Li
Original Paper


Two novel transition-metal coordination polymers with the formulas [Co(L1)(bbi)(H2O)]n (1) and {[Co(L2)(phen)]·H2O}n (2) (H2L1 = 1,4-naphthalenedi- carboxylic acid, H2L2 = 5-OH-1,3-benzenedicarboxylic acid, bbi = 1,1′-(1,4-butanediyl)bis(imidazole), phen = 1,10-phenanthroline) have been hydrothermally synthesized and characterized by techniques of single crystal X-ray diffraction, infrared spectra, elemental analysis, powder X-ray diffraction, and variable-temperature magnetic susceptibility measurements. X-ray crystal structure analyses reveal that complex 1 exhibits 2D framework with 4-connected sql topology and is further extended into a 3D supramolecular architecture via strong O–H···O and weak C–H···O hydrogen-bonding interactions, while complex 2 features a 1D ladder-like chain with a 3-connected (42·6) topological structure. Magnetic studies showed the presence of an antiferromagnetic interaction between adjacent Co(II) ions in both complexes.

Graphical Abstract

Two new mixed ligand complexes of cobalt based on N-heterocylic and carboxylate ligands were readily obtained and characterized. The topological structures, thermal stabilities and magnetic properties of which are observed and discussed.


Transition-metal coordination polymers Topological structure Mixed-ligands Magnetic properties 



This work was financially supported by the Scientific Research Foundation for the Introduced Talents of Kunming University of Science and Technology (No. KKSY201507026), the Analysis Testing Fund of Kunming University of Science and Technology (No. 2017T20040109, No. 2017M20152111048), the Joint Fund of National Natural Science Foundation of China and Yunnan (Grant No. U1502273), and the State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming 650093 (Grant No. CNMRCUKF1606).


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Yubo Xing
    • 1
    • 2
  • Yuqi Liu
    • 1
    Email author
  • Binfang Meng
    • 1
  • Xiaofei Xue
    • 1
  • Xinying Wang
    • 1
  • Wei Li
    • 1
    • 2
  1. 1.Faculty of ScienceKunming University of Science and TechnologyKunmingChina
  2. 2.Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunmingChina

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