Showing papers by "Beatriz S. Parajón-Costa published in 1999"
TL;DR: In this article, the electrochemical behavior of VOQ2OH or [VOQ2-OVOQ2] (Q = 8-hydroxyquinohnate anion) has been investigated by cyclic voltammetry in acetonitnie solutions.
Abstract: The electrochemical behavior of VOQ2OH or [VOQ2-OVOQ2] (Q = 8-hydroxyquinohnate anion) has been investigated by cyclic voltammetry in acetonitnie solutions. Although both species exist simultaneously at every condition analyzed, they can be clearly differentiated by this method. The effect of trace amounts of water on the electrochemical behavior is also discussed.
4 citations
TL;DR: In this paper, the electrochemical behavior of ethylic esters derived from the oxo-vanadium(V) complex Q2VO(OH) was investigated by cyclic voltamperometry in organic solvents.
Abstract: The electrochemical behavior of ethylic esters of the type Q2VO(OEt), derived from the oxo-vanadium(V) complex Q2VO(OH) (Q = 8-hydroxyquinoline, 5-chloro and 5, 7-dichloro-8-hy-droxyquinoline or 2-methyl-8-hydroxyquinoline), was investigated by cyclic voltamperometry in organic solvents. The detailed analysis of the results confirmed the generation of different complex species in solution. The presence of water in the solvents modifies the electrochemical behavior, as a consequence of the formation of a mixed valence dimer of the type [Q2VO-O-OVQ2]−. The somewhat different behavior of the 2-methyl-8-hydroxyquinoline derivative could also be explained. The analysis of the electronic spectra of the investigated solutions, after and during the electrochemical measurements, gave additional support to some of the proposed reactions, steps and mechanisms.
3 citations