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• W2944186249 abstract "We explored the mechanistic aspects of ion pair formation between electrochemically reduced radicals (Fc–cnq–1a $$^{bullet {_mathbf{-}}}$$ /Fc–cnq–1b $$^{bullet {_mathbf{-}}})$$ and dianions (Fc–cnq–1a $$^{2- }$$ /Fc–cnq–1b $$^{2-})$$ of ferrocenyl naphthoquinones (Fc–cnq–1a and Fc–cnq–1b) and several metal ions by cyclic voltammetry (CV), square wave voltammetry (SWV) and spectroelectrochemistry, for the first time. The experiments demonstrated that Fc–cnq–1a $$^{2-}$$ /Fc–cnq–1b $$^{2-}$$ were moderately affected with Na $$^{+}$$ , K $$^{+ }$$ and Cs $$^{+}$$ by slightly shifting to the anodic side, but were strongly influenced with Li $$^{+}$$ ion. Fc–cnq–1a $$^{bullet {_mathbf{-}}}$$ /Fc–cnq–1b $$^{bullet {_mathbf{-}}}$$ were not affected by alkali metal ions, indicating no ion pair formation between the radicals and these ions. Fc–cnq–1a $$^{2-}$$ /Fc–cnq–1b $$^{2-}$$ was not evolved in the presence of Be $$^{2+}$$ , Mg $$^{2+}$$ and Ca $$^{2+}$$ , but Fc–cnq–1a $$^{bullet {_mathbf{-}}}$$ /Fc–cnq–1b $$^{bullet {_mathbf{-}}}$$ appeared with their cathodic waves, and participated with intermediates, [(Fc–cnq–1b) $$_{2}{^{bullet {_mathbf{-}}}}$$ –Be $$^{2+}$$ and [(Fc–cnq–1a) $$^{bullet {_mathbf{-}}}$$ –Cl]. The most pronounced effect on the ion-pair formation of the Fc–cnq–1a $$^{bullet {_mathbf{-}}}$$ /Fc–cnq–1b $$^{bullet {_mathbf{-}}}$$ was observed in Be $$^{2+}$$ , indicating that Fc–cnq–1a or Fc–cnq–1b can selectively sense ultra-trace amount of Be $$^{2+}$$ (LOD = 3.6 ppb) among the other metal ions with SWV titration, for the first time, based on the strong ion pair formation reaction between the radicals and Be $$^{2+}$$ . Synopsis Ultra-trace amount of beryllium ion ( $${hbox {Be}}^{2+}$$ ) sensing (LOD = 3.6 ppb) through the ion pair formation between the electrochemically reduced ferrocenyl naphthoquinone radicals (Fc–cnq–1a $$^{bullet {_mathbf{-}}}$$ /Fc–cnq–1b $$^{bullet {_mathbf{-}}})$$ and $${hbox {Be}}^{2+}$$ ions by cyclic voltammetry (CV), square wave voltammetry (SWV), and for the first time spectroelectrochemistry is reported in this study." @default.
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• W2944186249 date "2019-05-01" @default.
• W2944186249 modified "2023-09-25" @default.
• W2944186249 title "Beryllium ion sensing through the ion pair formation between the electrochemically reduced ferrocenyl naphthoquinone radicals and $$hbox {Be}^{2+}$$ ions" @default.
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• W2944186249 doi "https://doi.org/10.1007/s12039-019-1616-7" @default.
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