Thiol-grafted covalent organic framework-based electrochemical platforms for sensitive detection of Hg(II) ions

Xiang Tang; Qingqing Zhang; Dongyang Chen; Lifeng Deng; Yaxu He; Jianxiu Wang; Chunyue Pan; Juntao Tang; Guipeng Yu

doi:10.1039/d3cc01954c

Thiol-grafted covalent organic framework-based electrochemical platforms for sensitive detection of Hg(II) ions

Chem Commun (Camb). 2023 Jul 11;59(56):8731-8734. doi: 10.1039/d3cc01954c.

Authors

Xiang Tang¹, Qingqing Zhang¹, Dongyang Chen², Lifeng Deng¹, Yaxu He¹, Jianxiu Wang¹, Chunyue Pan¹, Juntao Tang¹, Guipeng Yu¹

Affiliations

¹ Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China. reynard.tangjuntao@gmail.com.
² Hunan Provincial Center for Disease Control and Prevention, Changsha, Hunan 410083, China.

PMID: 37357533
DOI: 10.1039/d3cc01954c

Abstract

Triazine-based covalent organic frameworks functionalized by thiol and thioether (COF_S-CH₃/COF_S-SH) were designed and served as a platform that could bind with mercury ions specifically based on Hard-Soft-Acid-Base theory. As such, when employing COFs as a modifier in a carbon paste electrode (CPE), the COF_S-CH₃-modified CPE revealed an extraordinary performance (detection limit of 0.01 ppb; linear range of 0.1 to 1.0 ppb) and repeatability for electrochemical detection of trace mercury, even in real samples collected from tap or lake water. This innovative approach leverages the inherent properties of covalent organic frameworks (COFs) to enable highly sensitive and selective detection of target analytes.