ZHAI Li-Jun, TONG Ru, WANG Ci-Bin, SHI Meng-Jie, MO Ya-Nan, CHE Wen-Kai, NIU Yu-Lana* and HU Tuo-Ping*

Cite this article: Chin. J. Struct. Chem. 2021, 40, 1687-1695  DOI: 10.14102/j.cnki.0254-5861.2011-3354

Publication date: December 15, 2021

Keywords: coordination polymers, solvothermal synthesis, magnetic properties

ABSTRACT

Two new coordination polymers (Co-CPs), namely {[Co₈(DCPN)₄(1,2-bimb)₄(μ₃-OH)₄]·(CH₃CN)_0.5(H₂O)₂}_n (1) and {[Co₂(DCPN)(1,3-bimb)(μ₃-OH)]·H₂O}_n (2), where H₃DCPN = 6-(3,5-dicarboxyl-phenyl)nicotinic acid, 1,2-bimb = 1,2-bis(imidazole-1-methyl)benzene and 1,3-bimb = 1,3-bis(imidazole-1-methyl)benzene, have been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction analysis, elemental analysis (EA), infrared (IR) analysis, powder X-ray diffraction (PXRD) and thermogravimetric analysis (TGA). The structural analysis indicated that 1 is a 2D structure based on two different [Co₄(DCPN)₂(μ₃-OH)₂]_n SBUs, and 2 is a 3D framework based on [Co₄(DCPN)₂(μ₃-OH)₂] SBUs. In addition, the magnetic measurements showed that 1 and 2 have antiferromagnetic interactions between adjacent Co(II) ions. The slight difference of magnetic properties between 1 and 2 may be attributed to their different structures formed during the assembly process.