Two new Zn(ii) coordination polymers incorporating 2-(2,6-dichlorophenyl)-1 H -imidazo[4,5- f ][1,10]phenanthroline: Synthesis and structure

Based on phenanthroline derivate ligand and Zn( ii ), two novel coordination polymers, namely [Zn(L)(hta)] n ( 1 ) and {[Zn 2 (L) 2 (dhb) 2 ]·H 2 O} n ( 2 ) (L = 2-(2,6-dichlorophenyl)-1 H -imidazo[4,5- f ][1,10]phenanthroline, H 2 hta = heptanedioic acid, and H 2 dhb = 3,5-dinitro-2-hydroxybenzoic acid), have been synthesized under the hydrothermal condition. For 1 , each hta anion bridges two Zn( ii ) atoms in a tridentate mode to shape into a chain structure and through different π–π stacking interactions to form a three-dimensional supramolecular structure. The L ligand of 2 connects two neighbouring Zn( ii ) atoms to give a 1D chain, which is further extended into the 2D supramolecular layer.