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• W3010874507 endingPage "4507" @default.
• W3010874507 startingPage "4493" @default.
• W3010874507 abstract "Differentially selective molecular sensors that exhibit differential response toward multiple analytes are cost-effective and in high demand for various practical applications. A novel, highly differentially selective electrochemical and fluorescent chemosensor, 5, based on a ferrocene-appended coumarin-quinoline platform has been designed and synthesized. Our designed probe is very specific toward Fe3+ via a reversible redox process, whereas it detects Cu2+ via irreversible oxidation. Interestingly, it exhibits differential affinity toward the Cu+ ion via complexation. High-resolution mass spectrometry, 1H NMR titration, and IR spectral studies revealed the formation of a bidentate Cu+ complex involving an O atom of the amide group attached to the quinoline ring and a N atom of imine unit, and this observation was further supported by quantum-chemical calculations. The metal binding responses were further investigated by UV-vis, fluorescence spectroscopy, and electrochemical analysis. Upon the addition of Fe3+ and Cu2+ ions, the fluorescence emission of probe 5 shows a turn-on signal due to inhibition of the photoinduced electron transfer (PET) process from a donor ferrocene unit to an excited-state fluorophore. The addition of sodium l-ascorbate (LAS) as a reducing agent causes fluorescence turn off for the Fe3+ ion because of reemergence of the PET process but not for the Cu2+ ion because it oxidizes the ferrocene unit to a ferrocenium ion with its concomitant reduction to Cu+, which further complexes with 5. Thermodynamic calculations using the Weller equation along with density functional theory calculations validate the feasibility of the PET process. A unique combination of Fe3+, LAS, and Cu2+ ions has been used to produce a molecular system demonstrating combinational AND-OR logic operation." @default.
• W3010874507 created "2020-03-23" @default.
• W3010874507 creator A5004745265 @default.
• W3010874507 creator A5021852522 @default.
• W3010874507 creator A5035297727 @default.
• W3010874507 creator A5049944158 @default.
• W3010874507 date "2020-03-11" @default.
• W3010874507 modified "2023-10-18" @default.
• W3010874507 title "Oxidation-Induced Differentially Selective Turn-On Fluorescence via Photoinduced Electron Transfer Based on a Ferrocene-Appended Coumarin–Quinoline Platform: Application in Cascaded Molecular Logic" @default.
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• W3010874507 doi "https://doi.org/10.1021/acs.inorgchem.9b03650" @default.
• W3010874507 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33078935" @default.
• W3010874507 hasPublicationYear "2020" @default.
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