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Imine-Linked Covalent Organic Framework with a Naphthalene Moiety as a Sensitive Phosphate Ion Sensing.

Mohaddeseh AfshariMohammad DinariHossein FarrokhpourFelix Zamora
Published in: ACS applied materials & interfaces (2022)
Due to the excellent ion-sensing potential of covalent organic frameworks (COFs), the new imine-linked conjugated COF (IC-COF) is synthesized through a water-based synthesis reaction between 1,5-diaminonaphthalene and 2,4,6-tris(4-formylphenoxy)-1,3,5-triazine to create a luminescence sensor. It is noteworthy that the green synthesized IC-COF shows excellent selectivity to phosphate ions (PO 4 3- ) with a detection limit of 0.61 μM. The recyclability performance of IC-COF is high, indicating that it can be reused without a significant reduction in performance (5.2% decline after 5 cycles). Theoretical calculations using the density functional theory are performed on the IC-COF-PO 4 3- and IC-COF-Cu + complexes to explore the sensing mechanism. The fluorescence quenching in the presence of PO 4 3- ions is attributed to the difference between PO 4 3- binding sites to the IC-COF compared to Cu + , which leads to the considerable change in the IC-COF absorption spectrum from 400 to 600 nm.
Keyphrases
  • density functional theory
  • molecular dynamics
  • quantum dots
  • visible light
  • mass spectrometry
  • molecular dynamics simulations
  • high resolution
  • metal organic framework
  • loop mediated isothermal amplification