Engineering two-dimensional supramolecular self-assembly: The role of Cl atoms

Ceccatto A, Campi GR, Diaz VC, da Costa Ferreira EB, Waleska-Wellnhofer N, Freiberger EM, Jaekel S, Papp C, Steinrück HP, Mowbray DJ, de Siervo A (2025)

Publication Type: Journal article

Publication year: 2025

Journal

FlatChem

Book Volume: 50

Article Number: 100808

DOI: 10.1016/j.flatc.2025.100808

Abstract

On-surface synthesis is a powerful tool for engineering two-dimensional (2D) organic nanostructures by controlling intermolecular interactions between the building blocks. Herein, we explore the role of Cl adatoms in the synthesis and characterization of self-assembled 1,3,5-tris[4-(pyridin)-[1,1’-biphenyl]benzene (TPyPPB) networks on Ag(111), by combining scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT). In the absence of Cl, upon deposition at room temperature (RT), TPyPPB molecules form a highly ordered porous supramolecular network with triangular packing, stabilized by hydrogen bonds (N⋯H). In the presence of Cl adatoms, sublimated onto the surface using dichloro-(1,10-phenanthrolin)-platin(II) (Cl2PhPt) a second molecular precursor, we observe a so-called mixed phase or inverted packing, depending on the applied growth procedure. The mixed phase is characterized by a non-periodic structure stabilized by intermolecular interactions between TPyPPB, Cl2PhPt, and Cl. In contrast, when only Cl adatoms and TPyPPB are present on the Ag(111) surface, a non-porous supramolecular arrangement is obtained, stabilized by C–H⋯Cl hydrogen bonds.

Authors with CRIS profile

Natalie Waleska-Wellnhofer Lehrstuhl für Physikalische Chemie II Marie Freiberger Lehrstuhl für Physikalische Chemie II Simon Jaekel Lehrstuhl für Physikalische Chemie II Christian Papp Lehrstuhl für Physikalische Chemie II Hans-Peter Steinrück Lehrstuhl für Physikalische Chemie II

Involved external institutions

Universidade Estadual de Campinas (UNICAMP) / University of Campinas BR Brazil (BR) Universidad de Investigación de Tecnología Experimental (Yachay Tech) EC Ecuador (EC)

How to cite

APA:

Ceccatto, A., Campi, G.R., Diaz, V.C., da Costa Ferreira, E.B., Waleska-Wellnhofer, N., Freiberger, E.M.,... de Siervo, A. (2025). Engineering two-dimensional supramolecular self-assembly: The role of Cl atoms. FlatChem, 50. https://doi.org/10.1016/j.flatc.2025.100808

MLA:

Ceccatto, Alisson, et al. "Engineering two-dimensional supramolecular self-assembly: The role of Cl atoms." FlatChem 50 (2025).

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