X-ray photoelectron spectroscopic investigation of metallorganic complexes

Abstract

X-ray photoelectron, IR, UV, and also EPR spectroscopies are used to investigate complex copper and cobaltorganic compounds and ligands which are dicetones or quadridentates (unsaturated esters). These complexes are formed from metal fine powders by the method of fractional dissolution in complexones medium. The changes in vibration parameters of carbonyl and ester groups as well as metalloxidic bonds in IR and UV spectra support the ionization of copper and cobalt atoms. In accordance with the data of EPR and X-ray photoelectron spectra (PES) the compounds investigated are cluster systems measuring10 −8−10 −7 m. In copper acetyl acetonates, the nucleous of the cluster contains copper and copper ions with oxidation state near +2. As for cobalt acetyl acetonates, they generally have cobalt ions in the surroundings of carbonyl oxygens. This difference is accounted for by the coordination conditions. When triethylene glycol dimetacrylate (TGM-3) is applied as complexone, X-ray photoelectron spectra and EPR spectra show an increase in the electron density of the carbon-oxygen bond which is greater than the density of corresponding bonds in metal acetyl acetonates.