A double responsive fluorescent platform for sensing heavy metal ions based on a dual-emitting fluorescent covalent organic framework hydrogel film

Yinghua Jia; Jinmin Wang; Limin Zhao; Bing Yan

doi:10.1039/d2dt01810a

A double responsive fluorescent platform for sensing heavy metal ions based on a dual-emitting fluorescent covalent organic framework hydrogel film

Dalton Trans. 2022 Sep 26;51(37):14352-14358. doi: 10.1039/d2dt01810a.

Authors

Yinghua Jia¹, Jinmin Wang¹, Limin Zhao², Bing Yan¹

Affiliations

¹ School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China. byan@tongji.edu.cn.
² School of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China.

PMID: 36073174
DOI: 10.1039/d2dt01810a

Abstract

A new luminescent hybrid material with dual-emission centers (Eu@Dye@TpDq hydrogel) based on a covalent organic framework (COF) has been successfully prepared. First, we designed a dye (coumarin) modified COF (TpDq) hybrid fluorescent material (Dye@TpDq), and then the material was formed into a hydrogel film, with an Eu³⁺ ion being introduced as another luminescent center into the material during the cross-linking process. As a dual-emission fluorescent platform, it exhibits a double-response towards different heavy metal ions: a ratiometric identification response to Cu(II), and a turn-off fluorescence response to Cr(VI). This research not only introduces a novel synthesis of Eu³⁺-functionalized double emitting COF-based hydrogels, but also inspires the development of COF-based multifunctional analytical tools.