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FePc and FePcF(16) on Rutile TiO(2)(110) and (100): Influence of the Substrate Preparation on the Interaction Strength

Interface properties of iron phthalocyanine (FePc) and perfluorinated iron phthalocyanine (FePcF(16)) on rutile TiO(2)(100) and TiO(2)(110) surfaces were studied using X-ray photoemission spectroscopy (XPS), X-ray absorption spectroscopy (XAS), and low-energy electron diffraction (LEED). It is demon...

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Detalles Bibliográficos
Autores principales: Karstens, Reimer, Glaser, Mathias, Belser, Axel, Balle, David, Polek, Małgorzata, Ovsyannikov, Ruslan, Giangrisostomi, Erika, Chassé, Thomas, Peisert, Heiko
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6943671/
https://www.ncbi.nlm.nih.gov/pubmed/31847299
http://dx.doi.org/10.3390/molecules24244579
Descripción
Sumario:Interface properties of iron phthalocyanine (FePc) and perfluorinated iron phthalocyanine (FePcF(16)) on rutile TiO(2)(100) and TiO(2)(110) surfaces were studied using X-ray photoemission spectroscopy (XPS), X-ray absorption spectroscopy (XAS), and low-energy electron diffraction (LEED). It is demonstrated that the interaction strength at the interfaces is considerably affected by the detailed preparation procedure. Weak interactions were observed for all studied interfaces between FePc or FePcF(16) and rutile, as long as the substrate was exposed to oxygen during the annealing steps of the preparation procedure. The absence of oxygen in the last annealing step only had almost no influence on interface properties. In contrast, repeated substrate cleaning cycles performed in the absence of oxygen resulted in a more reactive, defect-rich substrate surface. On such reactive surfaces, stronger interactions were observed, including the cleavage of some C–F bonds of FePcF(16).