Journal of the Chilean Chemical Society
versão On-line ISSN 0717-9707
CAKIR, SEMHA e BCER, ENDER. SYNTHESIS, SPECTRAL CHARACTERIZATION AND ELECTROCHEMISTRY OF VANADIUM(V) COMPLEX WITH TRYPTOPHAN. J. Chil. Chem. Soc. [online]. 2010, vol.55, n.2, pp. 236-239. ISSN 0717-9707. doi: 10.4067/S0717-97072010000200020.
A new oxovanadium(V) complex of NH4VO3 and tryptophan (TrpH) has been synthesized in aqueous solution at pH 6.0 and characterized by elemental analysis, UV-Vis, FT-IR, 1H-NMR and mass spectroscopic data. The complex (Na4[V3O9(Trp)]) was diamagnetic in nature as was evident from the electrón spin resonance spectroscopy (ESR) and the magnetic susceptibility measurements, in conformity with the presence of vanadium(V) in the structure. The electrochemical behaviour of Na4[V3O9(Trp)] complex was also studied on the hanging mercury drop electrode (HMDE) by using cyclic voltammetry (CV). The cyclic voltammograms of Na4[V3O9(Trp)] complex exhibit two new reduction waves at —0.38 V and —1.01 V in Britton-Robinson buffer (pH 6.0) for the potential range from 0.0 V to -1.2 V.
Palavras-chave : Vanadium complexes; Tryptophan; Spectroscopy; Voltammetry.