Aftereffects of the 57Co(EC)57Fe-reaction in some cobalt and iron complexes

Abstract

Mossbauer emission spectra of iron and cobalt complexes, doped or labelled with 57C0, demonstrate that the 57Co(EC)57Fe reaction can have significant chemical effects, although the probability of displacement of the nascents7Fe is very low. Measurements on spe~ifically~~Co-labelled [Co(bipy),] [Co(CN),],2HZO failed to show transfer of b7Fe from one complex to the other.MOSSBAUER emission spectra of 57Fe formed by EC-can release an Auger cascade, Fe3+ may readily be decay of 57C0 in cobalt compounds often contain re-formed from Co2+; further it has been shown that in sonances which are different from those of the corre-hydrated cobaltous compounds Fe3+ can be stabilized sponding iron compounds.l Since the EC-process via radiolysis of water by the Auger electrons. The 1 H. H. Wickman and G. K. Wertheim, in ' Chemical Ap-appearance of resonances corresponding to FeII species plications of Mossbauer Spectroscopy,' eds. V.

Stabilization of the daughter species following the Auger event in some cobalt(III) chelates in different matrices

“…This is not likely to affect the results of the computer analyses significantly. 20 The 57Co(III) chelate dispersals in the matrices of sucrose and poly(ethylene oxide) exhibit very interesting behavior. The poly(ethylene oxide) matrix has a very strong tendency to stabilize the Fe(II) species, while the sucrose, matrix also tends to stabilize Fe(II) but to a much lesser extent.…”