A polythreaded three-dimensional architecture of undulated layers originated by the contribution of different supramolecular interactions

• Published in: Inorganic chemistry communications 2009-07, Vol.12 (7), p.691-694
• Main Authors: Kong, Zhi-Guo, Wang, Xiu-Yan, Carlucci, Lucia
• Format: Article
• Language: English
• Subjects: Coordination polymer; Polythreading; Pyrazino[2,3-f][1,10]phenanthroline; Topology
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2009.05.031

The compound [Cd2(NDC)2(L)2(H2O)]·0.5DMF (NDC=1,4-naphthalenedicarboxylate, L=pyrazino[2,3-f][1,10]phenanthroline and DMF=N,N′-dimethylformamide) shows an interesting polythreaded three-dimensional architecture of undulated layers originated by the contribution of different supramolecular interactions. The structure of compound [Cd2(NDC)2(L)2(H2O)]·0.5DMF (1) (NDC=1,4-naphthalenedicarboxylate, L=pyrazino[2,3-f][1,10]phenanthroline and DMF=N,N′-dimethylformamide) is reported. Two independent Cd(II) atoms in a distorted [CdO4N2] octahedral environment and three unique NDC ligands showing different coordination modes give strongly undulated two-dimensional grid motifs. Dangling L ligands are chelated to every Cd(II) atom decorating both sides of the layers. Due to the marked undulation of the layers, the large open windows are threaded by the dangling ligands of other layers producing a three-dimensional polythreaded supramolecular array that can be also described as a single three-dimensional framework if the extended columnar face-to-face π–π interactions are considered.