Abstract
The influence of X-ray irradiation in air of iron (III) chloride tetraphenylphorphyrin (FeTPPCl) thin films was carried out in order to investigate changes in optical properties. The changes of refractive index, n, and extinction coefficient, k, were calculated using spectrophotometric measurements of transmittance and reflectance at normal incidence over the spectral range 200–2500 nm. The obtained data of n and k were used to estimate the type of transitions and the optical and fundamental gaps before and after X-ray irradiation. In addition, the normal dispersion of the refractive index is discussed in terms the single oscillator model and Drude model of free carrier absorption.
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