We have studied the structure and stoichiometry of potassium doped iron phthalocyanine (FePc) films using a combination of electron diffraction and core level excitation studies. We show that iron phthalocyanine undergoes structural phase transitions upon potassium addition, which can be described by the formation of two potassium doped phases with K2FePc and K4FePc composition.
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Roth et al. (2008) studied this question.
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