Title
Construction and photoluminescence properties of a three‐dimensional ZnII coordination network based on naphthalene‐1,4‐dicarboxylic acid and 1,6‐bis(pyridin‐3‐yl)‐1,3,5‐hexatriene
Author
Qian-Kun Zhou, Lin Wang, Yun Xu, Ni-Ya Li
Year
2018
Journal
Acta Crystallographica Section C: Structural Chemistry
Abstract
In recent years, coordination polymers constructed from multidentate carboxylate and pyridyl ligands have attracted much attention because these ligands can adopt a rich variety of coordination modes and thus lead to the formation of crystalline products with intriguing structures and interesting properties. A new coordination polymer, namely poly[[μ2‐1,6‐bis(pyridin‐3‐yl)‐1,3,5‐hexatriene‐κ2N:N′](μ3‐naphthalene‐1,4‐dicarboxylato‐κ4O1,O1′:O4:O4′)zinc(II)], [Zn(C12H6O4)(C16H14N2)]n, has been prepared by the self‐assembly of Zn(NO3)2·6H2O, naphthalene‐1,4‐dicarboxylic acid (1,4‐H2ndc) and 1,6‐bis(pyridin‐3‐yl)‐1,3,5‐hexatriene (3,3′‐bphte) under hydrothermal conditions. The title compound has been structurally characterized by IR spectroscopy, elemental analysis, powder X‐ray diffraction and single‐crystal X‐ray diffraction analysis. Each ZnII ion is six‐coordinated by four O atoms from three 1,4‐ndc2− ligands and by two N atoms from two 3,3′‐bphte ligands, forming a distorted octahedral ZnO4N2 coordination geometry. Pairs of ZnII ions are linked by 1,4‐ndc2− ligands, leading to the formation of a two‐dimensional square lattice (sql) layer extending in the ab plane. In the crystal, adjacent layers are further connected by 3,3′‐bphte bridges, generating a three‐dimensional architecture. From a topological viewpoint, if each dinuclear zinc unit is considered as a 6‐connected node and the 1,4‐ndc2− and 3,3′‐bphte ligands are regarded as linkers, the structure can be simplified as a unique three‐dimensional 6‐connected framework with the point symbol 446108. The thermal stability and solid‐state photoluminescence properties have also been investigated.
Instrument
FP-8600
Keywords
Fluorescence, Photoluminescence, Solid state, Coordination chemistry, Polymers, Inorganic chemistry, Optical properties