Luminescent detecting of Fe3+ and Cr2O72- ions by three ternary 2D coordination polymers


To investigate the effects of central metal ions on the structures and luminescent sensing properties of ternary luminescent coordination polymers, three new complexes, {[Co(L)(TBTA)(H2O)(2)]center dot H2O}(n) (1), {[Zn(L)(TBTA)]center dot 1.9H(2)O}(n) (2) and [Cd(L)(TBTA)](n) (3) (L = 1,4-bis(5,6-dimethylbenzimidazol-1-yl)-2-butylene, H(2)TBTA = tetrabromoterephthalic acid), were synthesized and characterized. 1 and 3 reveal a sql layer, whereas 2 displays a hcb network. Three compounds can be used as probes for the sensitive sensing of Fe3+ and Cr2O72 ions by a luminescence quenching process. The limits of detection (LOD) of 1, 2 and 3 for the detection of Fe3+ ions are 1.61, 1.13 and 0.71 mu M, respectively, while the LOD for the sensing of Cr2O72 ions are 1.95, 2.31 and 1.84 mu M, separately Possible mechanisms for the luminescence quenching process toward Fe3+ and Cr2O72 ions are presented. The central metal ions of the three ternary CPs play a key role for the effective detection of Fe3+ ions. (C) 2021 Elsevier Ltd. All rights reserved.


Chemistry, Inorganic & Nuclear; Crystallography


Liu, LJ; Zhu, H; Han, C; Cui, GH; Fu, LS

nossos autores


This project was supported by the National Natural Science Foundation of China (51474086). This work was also developed within the scope of 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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