A new Co(II)-based coordination polymer, namely [Co(L)0.5(4,4΄-bipy)0.5(H2O)2]n (1, H4L = 1,3-di(3΄,5΄-dicarboxylphenyl)benzene, 4,4΄-bipy = 4,4΄-bipyridine), has been hydrothermally synthesized using the mixed-ligands self-assembly strategy and further fully characterized. The crystal structure is of monoclinic, space group C2/c with a =18.9124(10), b = 11.6150(5), c = 15.4380(6) Å, β =110.989(5)°, V = 3166.2(2) Å3, C16H13CoNO6, Mr =374.20, Z = 8, Dc = 1.570 g·cm–3, F(000) = 1496, μ =1.116 mm–1 , R = 0.0461 and wR = 0.1312 for 2328 observed reflections (I >2s(I)). The crystal structure analysis revealed that 1 is a 4-fold three-dimensional (3D) framework with (3,4)-connected dmd-type topology. Moreover, the thermal stability and magnetic property of 1 were also investigated.
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