Efficient antibiotics, small organic molecules and inorganic anions detection with a fluorescent Ni(II) coordination polymer based multiple sensor system

As a hotspot issue of global concern, the abuse of environmental and biological related molecules, including antibiotics, small organic molecules and inorganic anions poses a severe threat to the biological health and ecological environment. Accurate and effective monitoring of these species is of great significance. In this study, one novel nickel(II)-based coordination polymer [Ni(H(2)edda)(2)(Hbmoe)(2)] (Ni-CP) has been successfully designed and synthesized by using the mixed ligands 5,5 '-(ethane-1,2-diylbis(oxy)) diisophthalic acid (H(4)edda) and 1,1 '-bis(1H-benzimidazolyl) oxydiethane (bmoe). Significantly, this framework reveals great thermal and chemical stability and can retain its structural integrity when immersed in water or even in a certain acid/base aqueous solution (pH = 2-13) for a period of time. As expected, this material also exhibits strong fluorescence. Further investigations indicate that as-synthesized Ni-CP can be served as a multi-responsive sensing platform for the highly selective and sensitive detection of nitrofurazone (NFZ), acetylacetone (ACAC), MnO4- and Cr(VI) in aqueous media. The mechanisms for fluorescence quenching have been disclosed through thorough experimental and computational investigations.

Automated summary

In this study, a novel nickel(II)-based coordination polymer with great thermal and chemical stability was successfully designed and synthesized. This material exhibits strong fluorescence and can be used for the highly selective and sensitive detection of various substances.