Synthetically tuned structural variations in coordination polymers based on dicyanamide toward diverse physical properties

Three new two-dimensional coordination polymers (CPs), {Ni[N(CN)2]2(H2O)2·2DMAC}n for 1, {Ni[N(CN)2]2(DMAC)2}n for 2, and {Co[N(CN)2]2(DMSO)2}n for 3, have been synthesized with different synthetic methods. The crystallographic analysis indicates that CPs 1 and 3 crystallize in the monoclinic system with space group of P21/c, while CP 2 crystallizes in the orthorhombic system with space group of Pnma. CPs 1 and 3 exhibit the antiferromagnetic properties, while CP 2 shows the weak ferromagnetic property. The solid-state luminescence properties of CPs 1–3 have also been investigated. Compared with the dicyanamide, 1 and 2 show the blue shift with emission maximum around 310 nm, while CP 3 shows the band at 335 nm.