Ionic covalent organic framework for selective detection and adsorption of TcO4−/ReO4−†
Abstract
Herein, a novel fluorescent ionic covalent organic framework (BTTA–BDNP) based on a linked carbazole unit was constructed for the synchronous monitoring and capture of TcO4−/ReO4−. BTTA–BDNP has a fast fluorescence response time with a low detection limit (66.7 nM) for ReO4− (a non-radioactive substitute for TcO4−). Meanwhile, the high charge density and hydrophobic skeleton of BTTA–BDNP enable it to exhibit rapid and selective trapping of ReO4− in complex environments.