Zinc metal–organic framework with 3-pyridinecarboxaldehyde and trimesic acid as co-ligands for selective detection of Cr (VI) ions in aqueous solution

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Abstract

There is an increasing need for the development of probes for the detection of hexavalent chromium since it is a known carcinogen, which can cause adverse effects on human health. Metal-organic frameworks (MOFs) have shown successful detection and removal of hazardous substances from aqueous media. This work presents the use of simple organic ligands such as 3-pyridinecarboxaldehyde and trimesic acid with Zn(II) ion to fabricate a new MOF that exhibits sensitive and selective luminescence quenching response towards CrO42− and Cr2O72− species in aqueous solution. The MOF showed a detection limit of 0.67 μM (0.078 ppm) as CrO42− species and 1.91 μM (0.41 ppm) as Cr2O72− species. Results reveal that the as-synthesized MOF could serve as a good luminescent sensor for CrO42− and Cr2O72− species in the contaminated aqueous phase.

Original languageEnglish
Article number045007
JournalMethods and Applications in Fluorescence
Volume8
Issue number4
DOIs
Publication statusPublished - Oct 2020

Keywords

  • Cr(VI) pollution
  • Fluorescence detection
  • Nanorods
  • Porous MOF
  • Solvothermal synthesis

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Materials Science(all)
  • Spectroscopy

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