Studies of tetra-(p-fluorophenyl)porphyrins by x-ray photoelectron spectroscopy: Effect of reduction on charge distribution in Fe compounds

Publisher Website
Google Scholar
Abstract
We have studied the x‐ray photoelectron spectra arising from nitrogen 1s, fluorine 1s, and metal 2p levels of several compounds of tetra‐ (p‐fluorophenyl)porphine, including the free base and several iron compounds. Using the fluorine 1s level as an internal calibrant, we find that the N 1s binding energies agree well with previous results from this laboratory. The difference in Fe 2p binding energy between Fe(II) and low‐spin Fe(III) compounds is 1.6 eV. We show that the difference in the charge on Fe between the two types of compounds is equal to some 0.09 electron charges. Satellite structure, observed adjacent to the N 1s photolines, is also discussed.