One novel Co(Ⅱ) coordination polymer, namely [Co_4(L)_6(NO_3)_2](1) was prepared by solvothermal reactions of Co(NO3)2 with a(E)-2-[2-(3-thienyl)ethenyl]-8-quinolinol ligand(HL), which has been determined by single-crystal X-ray diffraction analyses and further characterized by means of elemental analyses, IR spectra, PXRD and thermogravimetric analyses(TGA). The core structure of complex 1 is an incomplete dicubane-like tetranuclear Co(Ⅱ) cluster, which is surrounded by six 8-hydroxy-quinolinate-based ligands and two nitrate ligands. Weak S–O interactions between the thienyl groups and nitrate ligands extend the adjacent tetranuclear Co(Ⅱ) clusters into a supramolecular(4, 4) net structure. Magnetic measurement indicates that the coupling within both molecules is overall antiferromagnetic.
