A water-stable 3-fold parallel interpenetrated Cd(II) coordination polymer as multi-responsive luminescent sensor for detecting Fe3+, Cr2O72- and FZD in aqueous media

Excessive release of inorganic and organic hazardous chemical pollutants have posed a great threat to public health and human sustainable development. Therefore, the detection of these hazardous chemicals become very important but challenging. In this work, a methyl-decorated acylamide-containing dicarboxylate ligand H2L was designed and synthesized. By using H2L and bpp ligands reacted with Cd(II) ions, a new coordination polymer {[Cd(L)(bpp)]center dot DMF center dot 2H(2)O} n (1) was solvothermally synthesized and characterized. Single-crystal X-ray diffraction suggests that 1 features an interesting 3-fold parallel interpenetrated structure based on three 2D sql layers through pi-pi and C-H center dot center dot center dot pi interactions, in which the uncoordinated acylamide groups are found and facilitate 1 to recognize analyte molecules. Complex 1 shows good water stability and luminescent property. The luminescent sensing experiments show that 1 could serve as a multi-responsive luminescent sensor for sensitive, selective and recyclable detecting Fe3+, Cr2O72- and furazolidone (FZD) in aqueous solution. The corresponding luminescent quenching mechanisms have also been discussed. Furthermore, complex 1 was successfully applied to determine Fe3+, Cr2O(7)(2-) and FZD in real water samples. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

Excessive release of inorganic and organic hazardous chemical pollutants poses a great threat to public health and sustainable development. In this work, a new coordination polymer with good water stability and luminescent property was designed and synthesized. It serves as a multi-responsive luminescent sensor for sensitive, selective and recyclable detection of Fe3+, Cr2O72-, and FZD in aqueous solution. The luminescent quenching mechanisms were also discussed.