Spectroscopic and electrochemical behavior of aqua-glycylglycinato-imidazole-copper(II), a model compound for Cu(II)/carnosine interactions

The title complex appears as a very good model for each of the two subunits which constitute the Cu(II) complex of carnosine, investigated in a previous paper. The electronic (reflectance), vibrational, and ESR spectra of both species were compared in detail. The ESR spectrum shows the typical chara...

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Bibliographic Details
Published in:Journal of inorganic biochemistry 1996-07, Vol.63 (1), p.19-27
Main Authors: Baran, E.J., Parajón-Costa, B.S., Ferrer, E.G., Lezama, L., Rojo, T.
Format: Article
Language:English
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Summary:The title complex appears as a very good model for each of the two subunits which constitute the Cu(II) complex of carnosine, investigated in a previous paper. The electronic (reflectance), vibrational, and ESR spectra of both species were compared in detail. The ESR spectrum shows the typical characteristics of a g-tensor with rhombic symmetry, and the present results confirms that the unusual ESR behavior of the dimeric Cu(II)/carnosine complex were originated in an exchange mechanism. The electrochemical behavior of the complex was investigated by cyclic voltammetry. A comparison of the results with those previously obtained for the Cu(II)/carnosine complex brings new evidence for the existence of a monomeric species in Cu(II)/carnosine solutions at room temperature.
ISSN:0162-0134
1873-3344
DOI:10.1016/0162-0134(95)00164-6