▎ 摘 要
The alteration of the electronic interface properties of iron phthalocyanine (Fe Pc) on Ni(111) by graphene interlayers is studied using both photoemission techniques (XPS and UPS) and X-ray absorption spectroscopy (XAS). Both XPS and)(AS clearly indicate a charge transfer from Ni(111) to the Fe ion of Fe Pc. In contrast to CoPc, this charge transfer can be completely suppressed by the introduction of a graphene buffer layer between Fe Pc and Ni(111). Further UPS measurements indicate that the interfacial charge transfer include also the Fe Pc macrocycle. Surprisingly, for Fe Pc and CoPc the energy level alignment after the formation of the interface dipoles is rather unaffected by both the introduction of a graphene buffer layer and charge transfer processes between the central metal atom of the Pc and the substrates.