E.p.r. study of paramagnetic metal ions in Victorian brown coal

Effect of ferrocene on the carbonization of poly(vinylidene chloride)

“…Although the origin of the 709-eV peak is not clear, the similarity between the variation of this peak and that of the intensity of the broad EPR absorption with iron content shown in Figure 6 suggests the same origin. As the clusters of paramagnetic elements show broad EPR peaks,22 23 we inferred that these signals originate from small clusters of the lower valence state of iron.…”