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

Greulich, Katharina; Belser, Axel; Basova, Tamara V.; Chassé, Thomas; Peisert, Heiko

doi:10.1021/acs.jpcc.1c08826

Cited by 12 publications

(14 citation statements)

References 111 publications

(225 reference statements)

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“…As is clearly visible in Figure , the separation between CC and CN is decreased at the interface, most significantly for FePcF 16 /Ag(111). The results for FePcF 16 are in good agreement with recently published data; smaller differences are ascribed to the slightly different film thicknesses in both cases. On Ag(111), also the CF component is shifted with respect to CC by −0.19 eV for the 1–2 ML coverage compared to the 1.7 nm film (Table ).…”

Section: Resultssupporting

confidence: 91%

“…At the chosen excitation energy of 385 eV, the recorded C 1s spectra are surface sensitive, and the mean free path of the electrons is about 0.8 nm . The results for FePcF 16 /Au(111) are very similar to recently published data, measured at higher excitation energies …”

Section: Resultssupporting

confidence: 88%

“…Fe2p XPS spectra for the FePcF 16 multilayer thin films and coverages in the monolayer range on Au(111) and Ag(111) are shown in Figure . The multilayer spectra exhibit a broad multiplet structure, typical for iron phthalocyanines (see, e.g., ref ). Additionally, at the chosen excitation energy, a broad F 1s loss peak appears at a binding energy of about 711 eV; the relative intensity depends, among others, on the detailed molecular orientation and arrangement.…”

Section: Resultsmentioning

confidence: 98%

“…The more inert FePcF 16 /Au(111) interface serves as a reference system (cf. also ref ). For the study, we apply photoemission (PES), X-ray absorption spectroscopy (XAS), and resonant photoemission spectroscopy (ResPES).…”

Section: Introductionmentioning

confidence: 80%

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Interface Properties of Perfluorinated Iron Phthalocyanine on Au(111) and Ag(111): The Influence of Iron and the Macrocycle

et al. 2022

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The molecular orientation and interface properties of Fe(II) hexadecafluoro-phthalocyanine (FePcF16) on Ag(111) are investigated by photoexcited electron spectroscopies: X-ray photoemission spectroscopy (XPS), X-ray absorption spectroscopy (XAS), and resonant photoemission (ResPES). The data are compared to those for FePcF16 on Au(111). The molecules are oriented predominantly flat, lying on both substrate surfaces; increased tilts are observed for FePcF16 on Au(111). On Ag(111), the electronic structure of FePcF16 is distinctly altered at the interface, involving both the macrocycle and the central metal atom. An interface state close to the Fermi energy exhibits a clear Fe character.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 80%

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Interface Properties of Perfluorinated Iron Phthalocyanine on Au(111) and Ag(111): The Influence of Iron and the Macrocycle

et al. 2022

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“…These substituents act via weak interactions (e.g., van der Waals, dipole–dipole, or hydrogen bonding). STM has also been used to investigate the effects of halogen interaction in the self-assembly process, − in cases of both halogenated tectons and halogenated solvents.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembly Dynamics and Stability through Concentration Control at the Solution/HOPG Interface

2022

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Understanding the formation kinetics and thermodynamics of self-assembled monolayers (SAMs) provides an insight into the delicate balance of intermolecular forces on the molecular scale. We herein investigate the growth, dynamics, and stability of a model noncovalent self-assembler, Co(II) octaethylporphyrin, at the solution−HOPG interface. Real-time imaging of the nucleation and growth of the self-assembled layer was captured and studied via scanning tunneling microscopy (STM) and further explored using computational methods. A custom STM solution flow cell was designed and implemented to allow for in situ monitoring of selfassembly at very low concentrations and with volatile solvents. Flow studies at low concentration provide an insight into early-stage formation kinetics and structure of the SAMs formed. It was found that the choice of organic solvent plays a dramatic role in the kinetics and structure of the SAM. These results, in turn, provide insight into the balance of the intermolecular forces driving the self-assembly. The role of the solvent was particularly strong in the case of 1,2,4-trichlorobenzene (TCB). Under TCB, a very stable rectangular structure is formed and stabilized by solvent incorporation. A transition to a solvent-free pseudo-hexagonal structure was only observed when the porphyrin was at near-solubility limit concentrations. Only the pseudo-hexagonal structure was observed in the porphyrin adlayer when toluene, decane, and 1phenyloctane were used as solvents. Mixed solvent competition was tested and gave further insight into the role solvent plays in the thermodynamics and kinetics of self-assembly.

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Structural Decoration of Porphyrin/Phthalocyanine Photovoltaic Materials

Mai,

Zhang,

et al. 2024

ChemSusChem

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Porphyrin/phthalocyanine compounds with fascinating molecular structures have attracted widespread attention in the field of solar cells in recent years. In this review, we focus on the pivotal role of porphyrin and phthalocyanine compounds in enhancing the efficiency of solar cells. The review seamlessly integrates the intricate molecular structures of porphyrins and phthalocyanines with their proficiency in absorbing visible light and facilitating electron transfer, key processes in converting sunlight into electricity. By delving into the nuances of intramolecular regulation, aggregated states, and surface/interface structure manipulation, it elucidates how various levels of molecular modifications enhance solar cell efficiency through improved charge transfer, stability, and overall performance. This comprehensive exploration provides a detailed understanding of the complex relationship between molecular design and solar cell performance, discussing current advancements and potential future applications of these molecules in solar energy technology.

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

Cited by 12 publications

References 111 publications

Interface Properties of Perfluorinated Iron Phthalocyanine on Au(111) and Ag(111): The Influence of Iron and the Macrocycle

Interface Properties of Perfluorinated Iron Phthalocyanine on Au(111) and Ag(111): The Influence of Iron and the Macrocycle

Self-Assembly Dynamics and Stability through Concentration Control at the Solution/HOPG Interface

Structural Decoration of Porphyrin/Phthalocyanine Photovoltaic Materials

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