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

• Published in: Acta crystallographica. Section C, Crystal structure communications Vol. 69; no. 1; pp. 33 - 36
• Main Authors: Li, Fa-Zhan, Li, Guo-Ting
• Format: Journal Article
• Language: English
• Published: 5 Abbey Square, Chester, Cheshire CH1 2HU, England International Union of Crystallography 01.01.2013; Wiley Subscription Services, Inc
• Subjects: Anions; Bridging; Cations; Dinitrates; Inversions; Ligands; Links; Networks
• ISSN: 0108-2701; 1600-5759
• DOI: 10.1107/S0108270112050214

In the title compound, {[Zn(C19H17N5O2)2(H2O)2](NO3)2}n, the ZnII cation is located at an inversion centre within a slightly distorted octahedron, ligated by four N atoms from four N2,N6‐bis[(pyridin‐3‐yl)methyl]pyridine‐2,6‐dicarboxamide (L) ligands occupying a plane about the ZnII atom with the two water O atoms perpendicular to that. In the complex molecule, the bidentate bridging L ligands display helical R and S conformers, and link the ZnII cations into a one‐dimensional centrosymmetric double‐chain structure containing 32‐membered rings. The nitrate anions reside in these rings and are involved in multiple N—H...O hydrogen‐bond interactions. On excitation at 390 nm, the title compound displays a strong blue emission centred at 449 nm. Investigation of the thermal stability shows that the network structure is stable up to 420 K.