Add time:09/10/2019         Source:sciencedirect.com

New polyaza ferrocene macrocyclic ligands 4–7 have been synthesised and with 4, copper(II) and nickel(II) transition metal complexes isolated. Electrochemical investigations reveal these redox-active ligands can electrochemically sense various transition metal cations in polar organic solvents and in water at high pH values with ligands 4 and 5. Aqueous electrochemical competition experiments with Ni2+, Cu2+ and Zn2+ suggest 4 and 5 exhibit a selectivity preference for the copper(II) cation. At lower pH values (6–8) the respective protonated polyammonium forms of 4, 5 and 7 complex and electrochemically detect the biologically important phosphate anions, ATP and hydrogen phosphate in the aqueous environment.

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