XANES and EXAFS of copper compounds: studies of copper carboxylates with metal-metal bonds and of the complex formed by Pseudomonas aeruginosa

X-ray absorpion near edge structure (XANES) of copper compounds with copper in 1+, 2+ and 3+ states has been studied. Extended X-ray absorption fine structure (EXAFS) has been employed to determine bond distances and coordination numbers in several model copper compounds. Employing both XANES and EXAFS, the structure of the copper complex formed by the micro-organism Pseudomonas aeruginosa has been shown to be square-planar with the Cu-O distance close to that in cupric glucuronates and cupric acetylacetonate. EXAFS has been shown to be useful for studying metal-metal bonds in copper carboxylates