A water-stable europium-MOF as a multifunctional luminescent sensor for some inorganic ions and dichloromethane molecule

Based on the ligand 2,2'-bipyridine-5,5'-dicarboxylic acid (H(2)bpdc), a luminescent Eu-MOF was successfully synthesized under solvothermal conditions, namely, [Eu(bpdc)(1.5)(H2O)(2)](n) (1). The experimental explorations showed that compound 1 could not only detect Fe3+ and Cu2+ ions with high selectivity and recyclability, but also serve as an excellent selective sensing material for PO43- ion among some anions. Surprisingly, as an outstanding example of Ln-MOFs with fluorescence response to dichloromethane in aqueous solution, compound 1 could also behave as a functional probe with high sensitivity, selectivity, and recyclability. Meanwhile, the possible distinguishing mechanisms of compound 1 for above ions and CH2Cl2 molecule were further speculated. (c) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

Automated summary

A luminescent Eu-MOF with high selectivity and recyclability was synthesized and showed capability to detect Fe3+ and Cu2+ ions, as well as act as a selective sensing material for PO43- ion. Additionally, it exhibited fluorescence response to dichloromethane in aqueous solution and acted as a functional probe with high sensitivity, selectivity, and recyclability, while possible distinguishing mechanisms for the ions and CH2Cl2 molecule were further speculated.