A new nickel(II) coordination polymer Ni2(L)2(bpa)2(H2O)n·3n(H2O) was solvothermally synthesized with nickel sulfate, 3-hydroxyisonicotinic acid (H2L) and 1,2-bi(4-pyridyl)ethane (bpa). The complicated space structure was confirmed by single-crystal X-ray diffraction analysis. The crystal belongs to the triclinic space group P-1. The L2– ligand bridges the Ni(II) to form a 2D layer, which is connected through bpa ligands to form a 3D framework structure. The thermal properties of the complex were investigated. The magnetic susceptibility data of the complex indicate that dominant antiferromagnetic interactions are mediated between Ni(II) centers.
Wang et al. (2026) studied this question.