Unique 3D CoII/ZnII-coordination polymers with (3,4,5)-connected self-penetrating topology: Syntheses, topological structures, luminescent and magnetic properties

Abstract

Under solvothermal conditions, the reactions of CoII or ZnII acetate with mixed-ligand 3-(pyridin-4-yl)-5-(pyrazin-2-yl)-1H-1,2,4-triazole (4-Hpzpt) and isophthalate (H2ip) afford two isomorphic compounds [M3(ip)2(4-pzpt)2(H2O)]n (M = CoII (1), ZnII (2)), which display a new hepta-nodal (3,4,5)-connected self-penetrating net assembled from 2D {[M3(4-pzpt)2]4+}n 63-hcb layers pillared by [M6(ip)4(H2O)2]4+ subunits, and show antiferromagnetic behavior for 1 and strong fluorescence for 2, respectively.