An unusual 2D → 3D polythreading framework based on a long 1,10-phenanthroline derivative ligand

• Published in: Inorganic chemistry communications Vol. 14; no. 7; pp. 1186 - 1189
• Main Authors: Wang, Xiu-Yan, He, Yu, Zhao, Li-Na, Kong, Zhi-Guo
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2011
• Subjects: Coordination polymer; Dipyrido[7,6-a:6′,7′-c]-3-chloropyrido[2,3-b]quinoxaline; Polythreading; Topology; Polythreading; Dipyrido[7,6-a:6′,7′-c]-3-chloropyrido[2,3-b]quinoxaline; Topology; Coordination polymer
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2011.04.024

In the compound [Pb 2(L) 2(1,4-bdc) 2] n (1), each Pb(II) atom is seven-coordinated by two nitrogen atoms from one L ligand, and five carboxylate oxygen atoms from three different 1,4-bdc ligands in a distorted monocapped triangular prismatic coordination geometry (1,4-bdc = 1,4-benzenedicarboxylate and L = dipyrido[7,6-a:6′,7′-c]-3-chloropyrido[2,3-b]quinoxaline). The Pb(II) atoms are connected together by the 1,4-bdc ligands to form a 2D network with large windows. The dangling L ligands of each layer are threaded into the voids of the two adjacent layers above and below, thus every window of each layer is threaded by only two dangling ligands that come from opposite directions. Finally, this unique simultaneous threading fashion of adjacent polymeric motifs gives the novel 2D → 3D polythreading array. In addition, the strong π–π interactions between the L ligands and the 1,4-bdc ligands of neighboring layers make great contribution to the structural stabilization of 1. A new coordination polymer has been synthesized by using a long 1,10-phenanthroline derivative ligand and a dicarboxylate ligand under hydrothermal condition, which represents an unusual example of 2D → 3D polythreaded system. [Display omitted] ► We reported a coordination polymer based on a 1,10-phenanthroline derivative ligand. ► The compound shows a polythreading coordination motif. ► Also, the compound reported here represents an unusual example of 2D → 3D polythreading system.