Title

Cyano-Functionalized Triarylamines On Au(111): Competing Intermolecular Versus Molecule/Substrate Interactions

Keywords

cyano functional group; dipolar coupling; scanning tunneling microscopy; self-assembly; triarylamines

Abstract

The self-assembly of cyano-substituted triarylamine derivatives on Au(111) is studied with scanning tunneling microscopy and density functional theory calculations. Two different phases, each stabilized by at least two different cyano bonding motifs are observed. In the first phase, each molecule is involved in dipolar coupling and hydrogen bonding, while in the second phase, dipolar coupling, hydrogen bonding and metal-ligand interactions are present. Interestingly, the metal-ligand bond is already observed for deposition of the molecules with the sample kept at room temperature leaving the herringbone reconstruction unaffected. It is proposed that for establishing this bond, the Au atoms are slightly displaced out of the surface to bind to the cyano ligands. Despite the intact herringbone reconstruction, the Au substrate is found to considerably interact with the cyano ligands affecting the conformation and adsorption geometry, as well as leading to correlation effects on the molecular orientation.

Publication Date

2-1-2014

Publication Title

Advanced Materials Interfaces

Volume

1

Issue

1

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1002/admi.201300025

Socpus ID

84921970788 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84921970788

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