Replacement of sp2-hybridized carbon in polycyclic aromatic hydrocarbons (PAHs) by boron affords electron-deficient π-scaffolds due to the vacant pz-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.
%0 Journal Article
%1 Pan_2024
%A Pan, Wun‐Chang
%A Mützel, Carina
%A Haldar, Soumyajyoti
%A Hohmann, Hendrik
%A Heinze, Stefan
%A Farrell, Jeffrey M.
%A Thomale, Ronny
%A Bode, Matthias
%A Würthner, Frank
%A Qi, Jing
%D 2024
%I Wiley
%J Angew. Chem. Int. Ed.
%K myown
%N 15
%R 10.1002/anie.202400313
%T Diboraperylene Diborinic Acid Self‐Assembly on Ag(111)—Kagome Flat Band Localized States Imaged by Scanning Tunneling Microscopy and Spectroscopy
%U http://dx.doi.org/10.1002/anie.202400313
%V 63
%X Replacement of sp2-hybridized carbon in polycyclic aromatic hydrocarbons (PAHs) by boron affords electron-deficient π-scaffolds due to the vacant pz-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.
@article{Pan_2024,
abstract = {Replacement of sp2-hybridized carbon in polycyclic aromatic hydrocarbons (PAHs) by boron affords electron-deficient π-scaffolds due to the vacant pz-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.},
added-at = {2024-04-04T13:20:16.000+0200},
author = {Pan, Wun‐Chang and Mützel, Carina and Haldar, Soumyajyoti and Hohmann, Hendrik and Heinze, Stefan and Farrell, Jeffrey M. and Thomale, Ronny and Bode, Matthias and Würthner, Frank and Qi, Jing},
biburl = {https://www.bibsonomy.org/bibtex/29e20ee1e8fabe2fd298220ee19728d6e/wuerthner_group},
doi = {10.1002/anie.202400313},
interhash = {5484c5835782784d8bdb63016b77973d},
intrahash = {9e20ee1e8fabe2fd298220ee19728d6e},
issn = {1521-3773},
journal = {Angew. Chem. Int. Ed.},
keywords = {myown},
month = feb,
number = 15,
publisher = {Wiley},
timestamp = {2024-04-04T13:20:16.000+0200},
title = {Diboraperylene Diborinic Acid Self‐Assembly on Ag(111)—Kagome Flat Band Localized States Imaged by Scanning Tunneling Microscopy and Spectroscopy},
url = {http://dx.doi.org/10.1002/anie.202400313},
volume = 63,
year = 2024
}