Imine-Linked Covalent Organic Framework with a Naphthalene Moiety as a Sensitive Phosphate Ion Sensing
EntityUAM. Departamento de Química Inorgánica
10.1021/acsami.1c24555ACS Applied Materials & Interfaces 14 (2022): 22398–22406
ISSN1944-8244 (print); 1944-8252 (online)
Funded byThe authors gratefully acknowledge the Research Affairs Division of the Isfahan University of Technology (IUT), Isfahan, for partial financial support. F.Z. thanks financial support from Ministerio de Ciencia e Innovacion (project PID2019-106268GB-C32)
SubjectsCovalent organic framework; DFT calculation; Ion sensing; Phosphate ion; Photoluminescence; Química
Rights© 2022 American Chemical Society
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
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 (PO43-) 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-PO43- and IC-COF-Cu+ complexes to explore the sensing mechanism. The fluorescence quenching in the presence of PO43- ions is attributed to the difference between PO43- 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.
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Google Scholar:Afshari, Mohaddeseh - Dinari, Mohammad - Farrokhpour, Hossein - Zamora Abanades, Félix Juan
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