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O: Fachverband Oberflächenphysik
O 87: Focus Session: Molecular Nanostructures on Surfaces: On-Surface Synthesis and Single-Molecule Manipulation III
O 87.2: Talk
Thursday, March 21, 2024, 15:30–15:45, HE 101
Probing dynamic covalent chemistry in a 2D boroxine framework — Paul Leidinger1, Mirco Panighel2, Virginia Pérez-Dieste3, Ignacio Villar-Garcia3, Pablo Vezzoni1, Felix Haag1, Johannes V. Barth1, Francesco Allegretti1, Sebastian Günther1, and •Laerte L. Patera1,4 — 1Technical University of Munich, Garching, Germany — 2CNR-IOM, Trieste, Italy — 3CELLS-ALBA, Cerdanyola del Valles, Spain — 4University of Innsbruck, Innsbruck, Austria
The use of dynamic covalent chemistry provides a powerful method for designing covalent organic frameworks, exploiting reversible bond formation to achieve remarkable crystallinity. Here we employed near-ambient pressure X-ray photoelectron spectroscopy to dissect the reversible construction of a two-dimensional boroxine framework on a Au(111) surface. By mapping the pressure-temperature parameter space, we identified the regions where the rates of the condensation and hydrolysis reactions become dominant. This precise identification is critical for enabling thermodynamically controlled growth of highly crystalline frameworks [1]. [1] P. Leidinger, et al., Nanoscale 15, 3, 1068-1075 (2023).
Keywords: Covalent Organic Frameworks; NAP-XPS; 2D materials; Dynamic Covalent Chemistry; On-surface synthesis