Polyarylether-based COFs coordinated by Tb for the fluorescent detection of anthrax-biomarker dipicolinic acid.

In this study, a rare-earth hybrid luminescent material (lanthanide@COF) was constructed for the detection of a biomarker for anthrax (dipicolinic acid, DPA). JCU-505-COOH was prepared by the hydrolysis of the cyano group in JCU-505 a post-synthetic modification strategy, then the carboxyl groups in JCU-505-COOH coordinated with Tb ions, similar to pincer vising nut. The prepared Tb@JCU-505-COOH exhibited a turn-on response toward DPA, which allowed the lanthanide@COF to serve as a fluorescence sensor with excellent selectivity and high sensitivity (binding constant = 3.