[en] Single crystal X-ray structural analysis reveals that the title complex crystallizes in orthorhombic I222 space group and exhibits a unique 3D supramolecular network containing open 2D channels along the a- and b-axis. In the asymmetric unit, there is only one crystallographically independent Zn ion, one PZDC ligand, half of coordinated 4,4'-bpy as well as half of free 4,4'-bpy molecule, and two coordinated water molecules together with one free water molecule. The Zn ion is six-coordinated, by two nitrogen atoms and one oxygen atom from one PZDC ligand, one nitrogen atom from one 4,4'-bpy molecule and two oxygen atoms from two water molecules. Therefore, the local coordination geometry of Zn ion is in a distorted octahedron with a N₂O₄ donor net and is shown in Figure 1. In the title complex, the coordinated 4,4'-bpy molecule bridges two Zn ions to generate a binuclear unit. Such binuclear units as the building blocks are linked by rich hydrogen bonds and π-π stacking interactions into 3D supramolecular network, which has open 2D channels and the channels volume is 37.8% of the total crystal volume as estimated by PLATON. Interestingly, in the complex the shape and size of the two channels are different