Anion-tunable architectures of Zn(II) complexes of a bis-pyridyl-bis-amide ligand: Syntheses, crystal structures and properties

catena-Poly[[[diaquazinc]-bis{μ-N2,N6-bis[(pyridin-3-yl)methyl]pyridine-2,6-dicarboxamide}] dinitrate]

“…In recent decades, pyridinecarboxamides, as multidentate heterocyclic ligands, have been widely used as spacers to construct intriguing metal-containing assemblies in coordination chemistry (Yue et al, 2005;Adarsh & Dastidar, 2011;Uemura et al, 2002). Among them, the U-shaped symmetric bispyridine-bisamides, which combine rigidity with flexibility, play an important role in engineering metal-containing macrocycles, nanocages and porous frameworks (Burchell et al, 2004;Wu et al, 2008;Wang et al, 2012). In particular, the labile conformations of U-shaped symmetric bispyridine-bisamides, especially the nonplanar conformers, can be recognized and used to direct self-assembly with metal cations.…”