Amine/hydrazone functionalized Cd(II)/Zn(II) metal-organic framework for ultrafast sensitive detection of hazardous 2,4,6-trinitrophenol in water

Manpreet KAUR, Mohamad YUSUF, Yiu Fai TSANG, Ki-Hyun KIM, Ashok Kumar MALIK

Research output: Contribution to journalArticlespeer-review

Abstract

Amine/hydrazone functionalized dual ligand Cd(II)/Zn(II) based metal-organic frameworks (MOFs) denoted as CdMOF- and ZnMOF-NH₂, respectively were synthesized via a simple conventional high-yield reflux method using low-cost and readily available starting materials, i.e., a Schiff base linker, 4-pyridylcarboxaldehydeisonicotinoylhydrazone (L₁) and 2-aminoterephthalic acid (H₂ata) linker. Crystallographic and thermogravimetric studies confirmed the formation of MOFs with good crystallinity and thermal stability. Photoluminescence studies point out that both MOFs can be used efficiently for fast sensing of 2,4,6-trinitrophenol (TNP) in water with noticeable turn-off quenching response. Their limits of detection (LODs) for TNP were 7 ppb and 10 ppb, respectively with enhanced selectivity toward TNP (over other nitro explosives) as verified by competitive nitro explosive tests. Density functional theory calculations and spectral overlap were used to assess the sensing mechanism. These MOF-based fluorescent sensing systems for TNP are demonstrated to have easy recoverability and high sensitivity. Copyright © 2022 Elsevier B.V. All rights reserved.

Original languageEnglish
Article number159385
JournalScience of the Total Environment
Volume857
Issue numberPart 2
Early online dateOct 2022
DOIs
Publication statusPublished - Jan 2023

Citation

Kaur, M., Yusuf, M., Tsang, Y. F., Kim, K.-H., & Malik, A. K. (2022). Amine/hydrazone functionalized Cd(II)/Zn(II) metal-organic framework for ultrafast sensitive detection of hazardous 2,4,6-trinitrophenol in water. Science of the Total Environment, 857(Part 2). Retrieved from https://doi.org/10.1016/j.scitotenv.2022.159385

Keywords

  • Metal-organic framework (MOF)
  • Schiff base ligand
  • Fluorescent sensor
  • 2,4,6-Trinitrophenol (TNP)
  • Density functional theory (DFT)
  • Spectral overlap

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