Novel Olefin-Linked Covalent Organic Framework with Multifunctional Group Modification for the Fluorescence/Smartphone Detection of Uranyl Ion

• DOI: 10.1021/acsami.4c05522
• Publication Date: 2024-05-17T07:25:40Z
• Authors: Deshuai Zhen; Chunlin Liu; Qiuhui Deng; Le Li; Craig A. Grimes; Shengyuan Yang; Qingyun Cai; Yu Liu
• Keywords: Uranyl; Surface Modification

Monitoring and purification of uranium contamination are great importance for the rational utilization resources maintaining environment. In this work, an olefin-linked covalent organic framework (GC-TFPB) its amidoxime-modified product (GC-TFPB-AO) synthesized with 3-cyano-4,6-dimethyl-2-hydroxypyridine (GC) 1,3,5-tris(4-formylphenyl) benzene (TFPB) by Knoevenagel condensation. GC-TFPB-AO results in specificity rapid fluorescent/smartphone uranyl ion (UO22+) detection based on synergistic effect multifunctional groups (amidoxime, pyridine, hydroxyl groups). features a highly sensitive adsorption UO22+ limit 21.25 nM. addition, it has good recovery (100–111%) fluorescence real samples, demonstrating excellent potential predesigned fluorescent COFs nuclear contaminated wastewater removal.