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Electrochemical Recognition of Metal Cations by Poly(crown Ether Ferrocene) Films Investigated by Cyclic Voltammetry and Electrochemical Impedance Spectroscopy by Alina C Ion; Jean-Claude Moutet; Alain Pailleret; Angela Popescu; Eric Saint-Aman; Elisabeth Siebert; Eleonora M Ungureanu is a Engineering article available to read on EtoBox.
What is Electrochemical Recognition of Metal Cations by Poly(crown Ether Ferrocene) Films Investigated by Cyclic Voltammetry and Electrochemical Impedance Spectroscopy about?
The electrochemical behavior of the pyrrole-substituted crown ether ferrocene 1 was investigated in detail in 0.1 M TBAP+CH 3 CN by cyclic voltammetry (CV) and chronoamperometry. In the potential range 0 -0.7 V, a reversible diffusion-controlled process was observed with a formal potential of 0.53 V corresponding to the ferrocene/ferricinium redox couple. Electro-oxidative polymerization of 1 was accomplished either by repeated CV scans, or by controlled potential electrolysis. The resulting polymer films were tested in acetonitrile electrolyte for the amperometric recognition of alkali and alkaline earth metal cations. Their remarkable recognition properties towards Ca 2 + and Ba 2 + cations have been confirmed by electrochemical impedance spectroscopy (EIS). EIS allowed construction of a calibration curve based on the variation of the low frequency capacity of the film as a function of the guest cation concentration, reflecting the variation of the formal potential between the free and the complexed immobilized redox couple. Capacity measurements using EIS appear to be an attractive method for cation sensing with films based on molecular redox receptors.
Who reads Electrochemical Recognition of Metal Cations by Poly(crown Ether Ferrocene) Films Investigated by Cyclic Voltammetry and Electrochemical Impedance Spectroscopy?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Alina C Ion; Jean-Claude Moutet; Alain Pailleret; Angela Popescu; Eric Saint-Aman; Elisabeth Siebert; Eleonora M Ungureanu
- Publisher
- Elsevier ; Elsevier BV (ISSN 1572-6657)
- Published
- 1999
- Language
- EN
- Field
- Engineering (Physical Sciences)