Diboraperylene Diborinic Acid Self-Assembly on Ag(111)-Kagome Flat Band Localized States Imaged by Scanning Tunneling Microscopy and Spectroscopy.
Wun-Chang PanCarina MützelSoumyajyoti HaldarHendrik HohmannStefan HeinzeJeffrey M FarrellRonny ThomaleMatthias BodeFrank WürthnerJing QiPublished in: Angewandte Chemie (International ed. in English) (2024)
Replacement of sp 2 -hybridized carbon in polycyclic aromatic hydrocarbons (PAHs) by boron affords electron-deficient π-scaffolds due to the vacant p z -orbital of three-coordinate boron with the potential for pronounced electronic interactions with electron-rich metal surfaces. Using a diboraperylene diborinic acid derivative as precursor and a controlled on-surface non-covalent synthesis approach, we report on a self-assembled chiral supramolecular kagome network on an Ag(111) surface stabilized by intermolecular hydrogen-bonding interactions at low temperature. Scanning tunneling microscopy (STM) and spectroscopy (STS) reveal a flat band at ca. 0.33 eV above the Fermi level which is localized at the molecule center, in good agreement with tight-binding model calculations of flat bands characteristic for kagome lattices.
Keyphrases
- polycyclic aromatic hydrocarbons
- high resolution
- single molecule
- electron microscopy
- quantum dots
- mass spectrometry
- high speed
- energy transfer
- highly efficient
- blood brain barrier
- solar cells
- genome wide
- molecular dynamics simulations
- water soluble
- single cell
- solid state
- ionic liquid
- human health
- optical coherence tomography
- risk assessment
- visible light
- heavy metals
- capillary electrophoresis
- biofilm formation
- network analysis
- tissue engineering
- cystic fibrosis