Mossbauer study of peroxynitrito complex formation with Fe-III-chelates uri icon

abstract

  • The reaction of the -oxo-diiron(III)-L complex (L = EDTA, ethylene diamine tetraacetate, HEDTA, hydroxyethyl ethylene diamine triacetate, and CyDTA, cyclohexane diamine tetraacetate) with peroxynitrite in alkaline solution was studied by Mssbauer spectroscopy using rapid-freezing technique. These complexes yield an (L)Fe III( 2-O 2) 2 complex ion when they react with hydrogen peroxide and the formation of the peroxide adduct results in a deep purple coloration of the solution. The same color appears when the reaction occurs with peroxinitrite. Although spectrophotometry indicated some difference between the molar extinction coefficients of the peroxo and the peroxinitrito adducts, the Mssbauer parameters proved to be the same within experimental error. It is concluded that the peroxynitrite ion decomposes when reacting with Fe III(L) and the peroxo adduct forms. 2011 Springer Science+Business Media B.V.

published proceedings

  • HYPERFINE INTERACTIONS

author list (cited authors)

  • Homonnay, Z., Buszlai, P., Nador, J., Sharma, V. K., Kuzmann, E., & Vertes, A.

citation count

  • 0

complete list of authors

  • Homonnay, Zoltan||Buszlai, Peter||Nador, Judit||Sharma, Virender K||Kuzmann, Erno||Vertes, Attila

publication date

  • March 2012