Novel fluorescent Schiff bases as Al3+ sensors with high selectivity and sensitivity, and their bioimaging applications
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A short set of three new Schiff base chemosensors with high selectivity and sensitivity towards Al3+ over other metal cations in aqueous solution were developed and fully characterized. Compounds (E)-1-((L-glutamine-imino)methyl)naphthalen-2-ol (A), (E)-1-((glucosamine-imino)methyl)naphthalen-2-ol (B), and (E)-3-hydroxy-4-(((2-hydroxynaphthalen-1-yl)methylene)amino)benzoic acid (C) exhibited a significant fluorescence enhancement in the presence of Al3+ over other competitive metal ions with a low detection limit of 0.103, 0.317 and 0.091 μM respectively, much lower than the WHO acceptable limit (0.05 mg/L or 1.85 μM of Al3+) in drinking water. The Schiff base C, shows high sensitivity in aqueous media (Limit of detection, LOD: 0.091 μM) and with a 38-fold (ϕ = 1.64% for Schiff free base; ϕ = 63.91% for Aluminium complex) fluorescence enhancement in the presence of Al3+. The theoretical research has enabled us to rationalize the behaviours of the three selective-sensors to Al3+ synthesized in this work. Based on the design, the amino acid Schiff bases (A) showed good solubility and compatibility with and without Al3+ and some fluorescent bioimaging (FBI) are reported in human epithelial cells Hs27. © 2019 Elsevier B.V.
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Correction: Quantum chemical elucidation of the turn-on luminescence mechanism in two new Schiff bases as selective chemosensors of Zn2+: Synthesis, theory and bioimaging applications (RSC Advances (2019) 9 (30778-30789) DOI: 10.1039/C9RA05010H) (2020) Berrones-Reyes J.C.; Muñoz-Flores B.M.; Cantón-Diáz A.M.; Treto-Suárez M.A.; Páez-Hernández D.; Schott E.; Zarate X.; Jiménez-Pérez V.M. (Royal Society of Chemistry, 2019)
Quantum chemical elucidation of the turn-on luminescence mechanism in two new Schiff bases as selective chemosensors of Zn2+: Synthesis, theory and bioimaging applications (2020) Berrones-Reyes J.C.; Muñoz-Flores B.M.; Cantón-Diáz A.M.; Treto-Suárez M.A.; Páez-Hernández D.; Schott E.; Zarate X.; Jiménez-Pérez V.M. (Royal Society of Chemistry, 2019)
Fluorescence turn-on and turn-off mechanisms of a dual-selective chemosensor of Bi3+ and pH changes: Insights from a theoretical perspective (2020) Treto-Suárez, Manuel Alejandro; Hidalgo-Rosa, Yoan; Schott V, Eduardo; Páez-Hernández, Dayán; Zárate, Ximena P. (Elsevier Ltd, 2021-02)The N-hydroxy 1,8-naphthalimide (LH) is an optical dual-selective chemosensor toward Bi3+ ions as well as pH changes. In specific, this senor is selective to Bi3+ ions, which turn-on the fluorescence upon their interaction; ...