Iodine passivation facilitates on-surface synthesis of robust regular conjugated two-dimensional organogold networks on Au(111)

Arash Badami-Behjat, Gianluca Galeotti, Rico Gutzler, Dominik L. Pastoetter, Wolfgang M. Heckl, Xinliang Feng, Markus Lackinger

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

Abstract

Two-dimensional conjugated organogold networks with anthra-tetrathiophene repeat units are synthesized by thermally activated debrominative coupling of 2,5,9,12-tetrabromoanthra[1,2-b:4,3-b′:5,6-b′′:8,7-b′′′]tetrathiophene (TBATT) precursor molecules on Au(111) surfaces under ultra-high vacuum (UHV) conditions. Performing the reaction on iodine-passivated Au(111) surfaces promotes formation of highly regular structures, as revealed by scanning tunneling microscopy (STM). In contrast, coupling on bare Au(111) surfaces results in less regular networks due to the simultaneous expression of competing intermolecular binding motifs in the absence of error correction. The carbon-Au-carbon bonds confer remarkable robustness to the organogold networks, as evidenced by their high thermal stability. In addition, as suggested by density functional theory (DFT) calculations and underscored by scanning tunneling spectroscopy (STS), the organogold networks exhibit a small electronic band gap in the order of 1.0 eV due to their high π-conjugation.

OriginalspracheEnglisch
Seiten (von - bis)1042-1051
Seitenumfang10
FachzeitschriftNanoscale Horizons
Jahrgang9
Ausgabenummer6
DOIs
PublikationsstatusVeröffentlicht - 11 Apr. 2024

Fingerprint

Untersuchen Sie die Forschungsthemen von „Iodine passivation facilitates on-surface synthesis of robust regular conjugated two-dimensional organogold networks on Au(111)“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren