Three water soluble coordination polymers: Synthesis, crystal structure and luminescent sensing for Cr(VI) and MnO4- ions in the aqueous aqueous phase

Three isostructural coordination polymers have been synthesized and structurally characterized by IR, TGA, PXRD and X-ray single crystal diffraction. The 1D butterfly chains assembled to a novel 3-D supramolecular framework via hydrogen bonding and pi-pi stack. The complex 1 exhibited high fluorescence stability in water solution and can simultaneously detect Cr2O72-, CrO42- and MnO4- ions in aqueous media with high quenching constant and low detection limits of 6.82 x 10(4) M-1 and 4.06 mu M for Cr2O72-, 1.38 x 10(3) M-1 and 26.1 mu M for CrO42- ions, 3.1 x 10 4 M-1 and 6.73 mu M for MnO4-. The result of interference study displayed that the compound can selectively detect Cr(VI) and MnO4- anions, indicating compound 1 may be a potential material for sensing Cr(VI) and MnO4- anions. (C) 2019 Elsevier Ltd. All rights reserved.