Adsorption of Phenylboronic Acid Derivatives on Rutile TiO2(110)

Wolfram A, Muth M, Williams FJ, Mehl S, Tsud N, Steinrück HP, Lytken O (2024)

Publication Type: Journal article

Publication year: 2024

Journal

DOI: 10.1021/acs.jpcc.4c03264

Abstract

Using high-resolution synchrotron-radiation photoelectron spectroscopy and near-edge X-ray-absorption fine structure, we have investigated the adsorption of three phenylboronic acid derivatives on rutile TiO2(110) at 300-700 K: 4-acetylphenylboronic acid, 1,4-phenylenediboronic acid, and 2,4,6-triphenylboroxine. Both 4-acetylphenylboronic acid and 1,4-phenylenediboronic acid adsorb in a singly deprotonated monodentate configuration at 300 K, which converts to a fully deprotonated bidentate species at 550 K. 2,4,6-Triphenylboroxine undergoes a ring-opening reaction upon adsorption on the surface and forms the fully deprotonated bidentate species already at 300 K. In the case of 1,4-phenylenediboronic acid, the upward-pointing boronic-acid groups polymerize into boronic anhydride chains upon heating starting at 350 K. For 2,4,6-triphenylboroxine, we find a slow boron-carbon bond cleavage over a wide temperature range, resulting in a slow disappearance of the phenyl rings from the surface. For 4-acetylphenylboronic acid, we observe a loss of the carbonyl group at 500-550 K. In addition, we observe the formation of trigonal boron oxide (B2O3) for all three molecules at temperatures above 600 K.

Authors with CRIS profile

Involved external institutions

Universidad de Buenos Aires (UBA) / University of Buenos Aires Argentina (AR) Elettra Sincrotrone Trieste S.C.p.A. Italy (IT) Univerzita Karlova v Praze / Charles University in Prague Czech Republic (CZ)

How to cite

APA:

Wolfram, A., Muth, M., Williams, F.J., Mehl, S., Tsud, N., Steinrück, H.-P., & Lytken, O. (2024). Adsorption of Phenylboronic Acid Derivatives on Rutile TiO2(110). Journal of Physical Chemistry C. https://doi.org/10.1021/acs.jpcc.4c03264

MLA:

Wolfram, Alexander, et al. "Adsorption of Phenylboronic Acid Derivatives on Rutile TiO2(110)." Journal of Physical Chemistry C (2024).

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