Abstract
In this work, we have analysed the Br K-edge XANES of (CHBr y) x excited by polarized X-ray in //c (parallel to fibril axis) and c directions for three different doping region. In the case of Br doping in the intermediate doping region (y=0.0145), the XANES analyses also confirm the model previously proposed by Oyanagi et al. based on EXAFS analyses, in which polyanions Br 3 − and covalently bonded bromine atoms coexist. From the analysis of E//c XANES, it is concluded that Br 3 − has larger polarization approximately shown by Br −0.6 Br 0.2 Br −0.6 than I 3 − by I −0.5 I 0.0 I −0.5.
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