J. Phys. IV France 7 (1997) C2-657-C2-658
XAS of Ni and Cu Quinoxaline-2,3-Dithiolene Complexes in Solution using a Novel In Situ Electrochemical CellJ. M. Charnock1, 2, D. Collison3, C. D. Garner3, E. J. L. Mclnnes3, J. F. W. Mosselmans1 and C. R. Wilson2
1 C.C.L.R.C. Daresbury Laboratory, Warrington WA4 4AD, UK
2 Department of Chemistry, University of Manchester, Manchester Ml3 9PL, UK
3 Department of Chemistry, University of Manchester, Manchester M13 9PL, UK
A novel electrochemical cell for XAS is presented. Using this cell XANES and EXAFS studies have been recorded of unstable redox active species in solution. In particular, changes in the immediate environment of the metal that occur upon oxidation of the metal dithiolene complexes [Ni(qdf)2]2- and [Cu(qdt)2]2- (where qdt = quinoxaline-2-3-dithioIate) have been studied. The position of the edge has been used to determine the site of the redox process and analysis of the EXAFS shows changes in the M-S bond length upon oxidation.
© EDP Sciences 1997