Dual functional fluorosensors based on flexible bis(pyridylbenzimidazole) derivatives with highly selective and sensitive detection of acetylacetone and Fe3+ ions

abstract

Two novel Zn(II)/Cd(II) coordination polymers (CPs), {[Zn(L)(DCTP)]center dot H2O}(n) (1) and [Cd-2(L)(DCTP)(2)](n) (2) (H2DCTP = 2,5-dichloroterephthalic acid, L = 1,3-bis(1-(pyridin-3-ylmethyl)-1H-benzo[d]imidazole-2-yl)propane) were successfully synthesized and characterized. The structure of 1 was formed by a 1D V-like chains and further packed a 2D supramolecular network through hydrogen bonding interactions. The structure of 2 featured an uncommon 3D lattice with the Schlafli symbol of {4.6(2).7(2).8}{4.6(2).7(3)}(2){4(2).6(2).7.8}. 1 and 2 displayed high thermostability and water-stability (pH = 3-12). Furthermore, based on luminescence quenching, both CPs 1 and 2 are the first report of fluorescent CPs from L ligand for the detection of acetylacetone and Fe3+ ions, with the merits of great efficiency, anti-interference and recyclability abilities.

keywords

METAL-ORGANIC FRAMEWORKS; LUMINESCENT; COMPLEXES; ACID; 2D; TRANSFORMATION; LIGANDS; SYSTEM; PROBE; MOF

subject category

Chemistry, Inorganic & Nuclear; Chemistry, Physical

authors

Su, YQ; Han, C; Fu, LS; Wei, RX; Cui, GH

our authors

acknowledgements

The project was supported by the National Natural Science Foundation of China (51474086) and the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement.

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