Orbital Mapping of Semiconducting Perylenes on Cu(111).
Giovanni Di SantoTanja MiletićMathias SchwendtYating ZhouBenson M KariukiKenneth D M HarrisLuca FloreanoAndrea GoldoniPeter PuschnigLuca PetacciaDavide BonifaziPublished in: The journal of physical chemistry. C, Nanomaterials and interfaces (2021)
Semiconducting O-doped polycyclic aromatic hydrocarbons constitute a class of molecules whose optoelectronic properties can be tailored by acting on the π-extension of the carbon-based frameworks and on the oxygen linkages. Although much is known about their photophysical and electrochemical properties in solution, their self-assembly interfacial behavior on solid substrates has remained unexplored so far. In this paper, we have focused our attention on the on-surface self-assembly of O-doped bi-perylene derivatives. Their ability to assemble in ordered networks on Cu(111) single-crystalline surfaces allowed a combination of structural, morphological, and spectroscopic studies. In particular, the exploitation of the orbital mapping methodology based on angle-resolved photoemission spectroscopy, with the support of scanning tunneling microscopy and low-energy electron diffraction, allowed the identification of both the electronic structure of the adsorbates and their geometric arrangement. Our multi-technique experimental investigation includes the structure determination from powder X-ray diffraction data for a specific compound and demonstrates that the electronic structure of such large molecular self-assembled networks can be studied using the reconstruction methods of molecular orbitals from photoemission data even in the presence of segregated chiral domains.
Keyphrases
- high resolution
- polycyclic aromatic hydrocarbons
- electron microscopy
- metal organic framework
- ionic liquid
- quantum dots
- single molecule
- electronic health record
- mass spectrometry
- big data
- molecularly imprinted
- high speed
- gold nanoparticles
- highly efficient
- working memory
- molecular docking
- room temperature
- solid phase extraction
- density functional theory
- aqueous solution
- magnetic resonance
- smoking cessation
- staphylococcus aureus
- artificial intelligence
- capillary electrophoresis