KOPS - The Institutional Repository of the University of Konstanz

Where do the counterions go? : Tip-induced dissociation of self-assembled triazatriangulenium-based molecules on Au(111)

Where do the counterions go? : Tip-induced dissociation of self-assembled triazatriangulenium-based molecules on Au(111)

Cite This

Files in this item

Checksum: MD5:81c0617f670cf6cf21477bc47f5feb38

SNEGIR, Sergii, Yannick J. DAPPE, Dmytro SYSOIEV, Olivier PLUCHERY, Thomas HUHN, Elke SCHEER, 2021. Where do the counterions go? : Tip-induced dissociation of self-assembled triazatriangulenium-based molecules on Au(111). In: Physical Chemistry Chemical Physics. Royal Society of Chemistry (RSC). 23(16), pp. 9930-9937. ISSN 1463-9076. eISSN 1463-9084. Available under: doi: 10.1039/D1CP00221J

@article{Snegir2021-04-28Where-53392, title={Where do the counterions go? : Tip-induced dissociation of self-assembled triazatriangulenium-based molecules on Au(111)}, year={2021}, doi={10.1039/D1CP00221J}, number={16}, volume={23}, issn={1463-9076}, journal={Physical Chemistry Chemical Physics}, pages={9930--9937}, author={Snegir, Sergii and Dappe, Yannick J. and Sysoiev, Dmytro and Pluchery, Olivier and Huhn, Thomas and Scheer, Elke} }

Dappe, Yannick J. 2021-04-28 Snegir, Sergii Huhn, Thomas Pluchery, Olivier Snegir, Sergii Sysoiev, Dmytro 2021-04-16T12:15:04Z Huhn, Thomas 2021-04-16T12:15:04Z Sysoiev, Dmytro Dappe, Yannick J. Chemical coupling of functional molecules on top of the so-called platform molecules allows the formation of functional self-assembled monolayers (SAMs). An often-used example of such a platform is triazatriangulenium (TATA), which features an extended aromatic core providing good electronic contact to the underlying metal surface. Here, we present a study of the SAM formation of a TATA platform on Au(111) employing scanning tunneling microscopy (STM) under ambient atmospheric conditions. In solution, the TATA platform is stabilized by BF<sub>4</sub> counterions, while after deposition on a gold substrate, the localization of the BF<sub>4</sub> counterions remains unknown. We used 1,2,4-trichlorobenzene as a solvent of TATA–BF<sub>4</sub> to induce SAM formation on a heated (∼50 °C) Au substrate. We show by STM how to detect and distinguish TATA–BF<sub>4</sub> from TATA platforms, which lost their BF<sub>4</sub> counterions. Finally, we observe a change of the counterion position on the SAM during the STM scanning, which we explain by an electric-field-induced decrease of the electrostatic interaction in TATA–BF<sub>4</sub> on the surface. We applied DFT calculations to reveal the influence of the gold lattice and the electric field of the STM tip on the stability of TATA–BF<sub>4</sub> physisorbed on the surface. Pluchery, Olivier Scheer, Elke eng Where do the counterions go? : Tip-induced dissociation of self-assembled triazatriangulenium-based molecules on Au(111) Scheer, Elke terms-of-use

This item appears in the following Collection(s)

Search KOPS


Browse

My Account