Phase Separation of Binary Triptycenes by an Iodine Interlayer Film on a Ag(111) Surface
We report the self-assembly behaviors of two triptycenes (Trip-<b>1</b> and Trip-<b>2</b>) on metal surfaces without and with an iodine passivation interlayer by combining scanning tunneling microscopy (STM) and density functional theory (DFT) studies. On the Ag(111) surface, Trip-<b>1</b> molecules form islands through intermolecular aldehyde-aldehyde hydrogen bonding and π-π stacking of benzene rings. In contrast, Trip-<b>2</b> molecules lie flat and dispersed on the surface. The introduction of Trip-<b>2</b> molecules can break the ordered assembly of Trip-<b>1</b>. Trip-<b>1</b> and Trip-<b>2</b> molecules will be mixed in a disorderly manner. On the iodine-passivated Ag(111) surface, Trip-<b>1</b> molecules form islands of long chains by intermolecular aldehyde-aldehyde hydrogen bonding. Trip-<b>1</b> and Trip-<b>2</b> molecules will automatically be separated, forming a self-assembled binary monolayer. These results show that the interface can adjust the mixture and separation of two structurally analogous triptycenes.
Authors
- Zhixin Hu (ORCID: https://orcid.org/0000-0002-3253-6964)
- Hong‐Ying Gao (ORCID: https://orcid.org/0000-0001-6831-9112)
- Hongchao Wang (ORCID: https://orcid.org/0000-0001-7196-9263)
- Peichao Wang
- Zichan Zheng
- Peizhen Liu
Institutions
- Tianjin University (CN)
- Joint Center for Quantum Information and Computer Science (US)
- Unité Matériaux et Transformations (FR)
Publication Details
- Journal
- The Journal of Physical Chemistry Letters
- Published
- 2025-03-17
- DOI
- https://doi.org/10.1021/acs.jpclett.5c00334
- Citations
- 1
- Primary Topic
- Surface Chemistry and Catalysis
- Type
- article
- Field-Weighted Citation Impact
- 0.67
Funders
- National Natural Science Foundation of China
- Fundamental Research Funds for the Central Universities