Spectroscopic characterization of iodine doped fluorogallium(III) porphyrins. Determination of the nature of the counterion by raman and 129I mössbauer spectroscopies

Abstract The characterization of iodine counterions in doped fluorogallium(III) porphyrins is reported and the synthesis of a 129 I 2 doped complex is described. The presence of I 3 − and I 5 − anions was enhanced on the basis of Raman spectroscopy data. The analysis of 129 I Mossbauer spectra allowed determination of the presence of I − and the relative amounts of I − , I 3 − , I 5 − species. Additional results obtained by ESR spectroscopy showed the localization of the positive charge on the porphyrin π-ring system. Furthermore, the X-ray diffraction measurements enhanced two different lattices corresponding to the porphyrin and iodine chains respectively.