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  • 1
    Electronic Resource
    Electronic Resource
    Electrochemistry of mononuclear, homo- and hetero-binuclear complexes of a schiff base compartmental ligand (1983)
    Springer
    Transition metal chemistry 8 (1983), S. 294-298 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The electrochemical behaviour of mononuclear and dinuclear complexes of dioxouranium(VI) (or uranyl), nickel(II) and copper(II) ions with the ethylenediamine Schiff base derivate ofo-acetoacetylphenol, H4aapen, has been studied in dimethyl sulfoxide solvent both at platinum and mercury electrodes. In the mononuclear complexes the metal ion can occupy either the N2O2 compartment or the O2O2 compartment. In the dinuclear complexes, both homodinuclear and heterodinuclear species can be obtained. This paper deals with the following derivates; nickel and uranyl mononuclear complexes, with the nickel(II) ion coordinated in the inner N2O2 compartment and with the uranyl ion coordinated in the outer O2O2 compartment respectively; uranyl-nickel and uranyl-copper heterodinuclear complexes, with the uranyl ion in the O2O2 site; copper and nickel homodinuclear complexes. The electrode mechanism has been investigated by cyclic voltammetry, chronoamperometry and controlled potential coulometry. For dinuclear complexes, formal potentials are also discussed in terms of the stabilisation of electrogenerated mixed-valence compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00620874
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  • 2
    Electronic Resource
    Electronic Resource
    Performance of platinum-based spherical mercury microelectrodes in cyclic voltammetry and stripping analysis (1995)
    Weinheim : Wiley-Blackwell
    Electroanalysis 7 (1995), S. 980-986 
    Details
    ISSN: 1040-0397
    Keywords: Microelectrodes ; Stripping analysis ; Mercury ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The performance of spherically shaped mercury microelectrodes, formed by electroreduction of mercury onto an inlaid platinum microdisk of radius r, characterized by different deposit heights, h, have been investigated for cyclic (CV) and anodic stripping (ASV) voltammetry. Electrodes with h/r ratio in the range 0.1-2 have been tested in solutions containing Pb2+ and Cd2+ in NaCl and NaClO4 + HClO4 as supporting electrolytes. For cyclic vodtammetry the results obtained indicated that the width at half height (w1/2), the peak current (ip) and the charge of the anodic stripping peak (Qs) depend on the h/r parameter. Particular attention has been devoted to the relation between the charge of the cathodic process and the anodic charge of the stripping peaks. It has been found that the experimental charge values involved in the cathodic and anodic scan agree within 3%, irrespective of the mercury thickness, indicating a complete stripping of the metals deposited in the mercury. For ASV the Pt-Cd intermetallic compounds have been found to influence the stripping peak of cadmium for electrodes with h/r ≤ 1 and for concentrations of Cd2+ lower than 10-6 M. By exploiting the known properties of the mercury microelectrodes in stripping analysis, an absolute method, based on the charge associated with the stripping peak, has been applied for determining the labile fraction of the above cations in a pore-water sample of the Venice lagoon.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140071013
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    Paper (German National Licenses)
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