In:
Collection of Czechoslovak Chemical Communications, Institute of Organic Chemistry & Biochemistry, Vol. 54, No. 1 ( 1989), p. 64-69
Kurzfassung:
Electrochemical oxidation of [V(IV)O(nta)(H 2 O)] - (H 3 nta nitrilotriacetic acid) was studied in aqueous solution by means of cyclic voltammetry, differential pulse polarography, and current sampled DC polarography on mercury as electrode material. In the pH-range under study (5.5-9.0) the corresponding V(V) complex is produced by one-electron oxidation of the parent V(IV) species. The oxidation product is stable within the time scale of cyclic voltammetry. The evaluation of the pH-dependence of the half-wave potentials leads to a p K a value for [V(IV)O(nta)(H 2 O)] - which is in a good agreement with previous determinations. The measured value for E 1/2 is very close to the formal potential E 0 calculated via the Nernst equation on the basis of known literature values for log K ox and log K red , the complex stability constants for the oxidized and reduced form, respectively.
Materialart:
Online-Ressource
ISSN:
0010-0765
,
1212-6950
DOI:
10.1135/cccc19890064
Sprache:
Englisch
Verlag:
Institute of Organic Chemistry & Biochemistry
Publikationsdatum:
1989
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