Determinação dos fatores responsáveis pela degradação dos complexos de cobre na espectroscopia raman

Abstract

Raman spectroscopy is highly valuable in the study of metal complexes; this technique allows the identification of characteristics bands of metal-(O,S,N)ligand bonds, which are often not detected by other techniques. However, some compounds, mainly copper complexes, can undergo degradation during analysis. Although this phenomenon is known to researchers, it lacks extensive studies and a definitive explanation. One hypothesis for this occurrence is the activation of photochemical pathways by the incidence of a beam with the same wavelength as certain d-d electronic transitions of the metal ion, which can result in the degradation of the compound. Therefore, this work aims to study the behavior of copper complexes in Raman vibrational spectroscopy and to correlate this with electronic transitions using UV-VIS electronic spectroscopy, in order to determine the factors for degradation and the conditions for obtaining a high-quality Raman spectrum.