Highly selective detection of Cu2+ in aqueous media based on Tb3+-functionalized metal-organic framework

In this work, a metal-organic framework UiO-66-(COOH)(2) has been synthesized and is further functionalized with Tb3+ through coordination interactions. The functionalized MOF, denoted as Tb3+@UiO-66-(COOH)(2), is fully characterized and further developed as an excellent fluorescent probe to monitor Cu2+ ions in aqueous media by fluorescence quenching effect. Tb3+@UiO-66-(COOH)(2) exhibits high selectivity and sensitivity, broad linear concentration range (0-200 mu M), low detection limits (0.23 mu M), fast response speed (within 1 min), as well as in situ naked eye observation under UV light for sensing Cu2+ ion. Furthermore, this probe was successfully employed to detect Cu2+ ion in real waterwith good recovery. Hence, this work developed a very excellent fluorescent sensor with high potential practical applications for detection of Cu2+ ion in environmental water samples. (c) 2020 Elsevier B.V. All rights reserved.