4.6 Article

Interfaces between Different Iron Phthalocyanines and Au(111): Influence of the Fluorination on Structure and Interfacial Interactions

Journal

JOURNAL OF PHYSICAL CHEMISTRY C
Volume 126, Issue 1, Pages 716-727

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.1c08826

Keywords

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Funding

  1. state of Baden Wurttemberg through bwHPC
  2. German Research Foundation (DFG) [INST 40/575-1 FUGG]
  3. Ministry of Science and Higher Education of the Russian Federation [N 121031700314-5]

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The interface properties and electronic structures of FePc, FePcF4, and FePcF16 were studied and compared using STM, XPS, and UPS. It was found that fluorination altered the structural ordering and total interface dipole, while the local interactions of the central iron atom with the Au(111) surface remained unchanged. The interplay of substrate-molecule and intermolecular interactions was discussed.
The interface properties of iron phthalocyanine (FePc) as well as partially fluorinated and perfluorinated iron phthalocyanine (FePcF4 and FePcF16) have been studied and compared. Well-ordered monolayers have been prepared and investigated with scanning tunneling microscopy (STM). X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) have been used to study the electronic structure of FePcFx in the monolayer in comparison with FePcFx in thin films. While the fluorination changes the structural ordering as well the total interface dipole, local interactions of the central iron atom and the Au(111) surface remain unchanged. The interplay of substrate-molecule and intermolecular interactions is discussed.

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