Characterize and Mediate Assembly of Triptycenes on Au(111) Surface.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38861269.
- Also identified by DOI 10.1021/acsnano.4c02648.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Herein, we report the assembly behavior of triptycenes with aldehyde (Trip-<b>1</b>) and amino (Trip-<b>2</b>) groups on pristine and iodine-passivated Au(111) surfaces by a combination of scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and density functional theory (DFT) calculation. On Au(111) surface, Trip-<b>1</b> forms long trimer chains and two-dimensional islands via aldehyde-aldehyde hydrogen bonding in one dimension and π-π stacking of adjacent benzene rings in the other dimension. In contrast, Trip-<b>2</b> lies as individuals or in disorderly stacked islands. Trip-<b>2</b> and Trip-<b>1</b> can be mixed in an arbitrary ratio. And Trip-<b>2</b> molecules disrupt the ordered self-assembly structure of Trip-<b>1</b> due to the formation of stronger aldehyde-amino hydrogen bonding. DFT, XPS, and Raman spectra confirm the conformational difference of Trip-<b>1</b> and -<b>2</b>, as well as the aldehyde-amino hydrogen bonding formation in Trip-<b>1</b> and Trip-<b>2</b> mixture. On the iodine-passivated Au(111) surface, Trip-<b>1</b> forms single-molecule chains and a hexagonal closely packed structure due to iodine interlayer mediation. Trip-<b>2</b> molecules disrupt the hexagonal closely packed structure of Trip-<b>1</b>.