A 3D supramolecular network as highly selective and sensitive luminescent sensor for PO43− and Cu2+ ions in aqueous media. (March 2018) - Xie, Yuan
Abstract: A 2D coordination polymer, {[Zn(btca)(py)2 ]} n (1 ), (H2 btca = benzotriazole-5-carboxylic acid, py = pyridine), has been prepared with high yield by the hydrothermal reaction of H2 btca and Zn(NO3 )2 ·6H2 O in the presence of py, which has been further characterized by kinds of methods combining elemental analysis, thermogravimetric (TG) analysis, infrared (IR) spectrum, powder X-ray diffraction (PXRD), and X-ray single-crystal diffraction. In1, each Zn 2+ adopts a five-coordinated pentagonal bipyramid geometry with one O atom from one carboxylate group of btca 2− ligand and four N atoms from two btca 2− ligands and two py molecules. Adjacent Zn 2+ are connected by btca 2− ligands to generate a 2D layer with the 'fes '-type topology, which could further form a 3D supramolecular network through hydrogen bonds interactions. Furthermore, the luminescent results reveal that the detection limit of1 as a luminescent sensor to probe Cu 2+ and PO4 3− could reach 3 and 45 ppm, respectively, suggesting that1 can sensitively and selectively detect Cu 2+ and PO4 3− in aqueous solution. Graphical abstract: Highlights: A 3D supramolecular network has been prepared and characterized by various tools. The luminescent properties of the title compound have been investigated. The product can sensitively and selectively detect Cu 2+ in aqueous solution. The product can sensitively and selectively detect PO4 3− in aqueous solution. The detection limit for probing Cu 2+ and PO4 3− can reach 3 and 45 ppm, respectively.