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QUANTITATIVE Cu X-RAY ABSORPTION EDGE STUDIES : OXIDATION STATE AND SITE STRUCTURE DETERMINATION

http://dx.doi.org/10.1051/jphyscol:19868230 01/1986; DOI: 10.1051/jphyscol:19868230

ABSTRACT X-ray absorption edge studies of Cu(I) complexes with different coordination number and covalency reveal that the 8983-8984 eV feature (assigned as the 1s→4p transition) can be correlated with ligation and site geometry. These Cu(I) features have been qualitatively interpreted using a Ligand Field model, and this has been applied to analyze the polarized single crystal, pH dependent edge spectra of reduced plastocyanin. In addition, normalized difference X-ray absorption edge analysis has been used to quantitatively determine the percent of Cu(I) in several derivatives of the multicopper oxidase, laccase.

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May 21, 2014