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Updated: Aug 16, 2025

Author Spotlight: Accelerating Discovery in Microporous Material Chemistry
Published on: October 6, 2023
Selective recognition of Hg2+ ions in aqueous solution by a CdII-based metal-organic framework with good stability
Xiao-Qin Cao1, Wei-Peng Wu1, Qiang Li1
1School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China. sjliu@jxust.edu.cn.
Abstract:
A novel water-stable CdII-based metal-organic framework, namely {[Cd(BIBT)(TDC)]·2H2O} (JXUST-28, BIBT = 4,7-bi(1H-imidazol-1-yl)benzo-[2,1,3]thiadiazole and H2TDC = 2,5-thiophenedicarboxylic acid), was synthesized using a mixed-ligand strategy. Structural analysis demonstrates that JXUST-28 exhibits a two-dimensional layer structure with 4-connected sql topology. Intriguingly, JXUST-28 presents good stability in boiling water (at least 5 days), common organic solvents and aqueous solutions with different pH values of 2-12 (more than 24 hours). Furthermore, fluorescence experiments revealed that JXUST-28 could sense Hg2+ ions in aqueous solution via a quenching effect with a detection limit of 0.097 μM. Meanwhile, JXUST-28 can also be regenerated at least 5 times to detect Hg2+ ions. In addition, light-emitting diode lamps, luminescent films, and test papers of JXUST-28 have been successfully developed for practical applications.
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