Poly[[tris­(μ-4,4′-bipyridine-κ(2) N:N′)bis­(μ-l-lysinato-κ(3) N (1),O (1):O (1′))dizinc(II)] tetra­nitrate 0.6-hydrate dimethyl­formamide disolvate]

In the title compound, {[Zn(2)(C(6)H(14)N(2)O(2))(2)(C(10)H(8)N(2))(3)](NO(3))(4)·0.6H(2)O·2C(3)H(7)NO}(n), the Zn(II) ion is six-coordinated with a distorted octa­hedral geometry by two carboxyl­ate O atoms and one amino N atom from two l-lysinate (l-lys) ligands, and three N atoms from three 4,4′-bipyridine (4,4′-bipy) ligands. The Zn(II) ions are connected by the carboxyl­ate groups of the l-lys ligands in the a-axis direction and the bridging 4,4′-bipy ligands in the b- and c-axis directions, forming a three-dimensional cationic framework with channels along [100]. The nitrate anions and solvent water and dimethyl­formamide (DMF) mol­ecules are located in the channels and linked to the cationic framework by N—H⋯O and O—H⋯O hydrogen bonds. The occupancy of the water mol­ecule was fixed at 0.6. One of the DMF mol­ecules is disordered over two sets of sites, with an occupancy ratio of 0.632:0.368 (11).