Reactivity of Aromatic Amines Under O2 Exposure on Metal Surfaces

doi:10.31635/ccschem.025.202505861

Reactivity of Aromatic Amines Under O2 Exposure on Metal Surfaces

2025-11-01

0

PRE

AI

DOI：10.31635/ccschem.025.202505861

Original

Original request for help

Save

Abstract

En 中文

Aromatic amines (AAs) are widely used in manufacturing industries, where their oxidation plays a crucial role in direct applications and the synthesis of nitrogen-containing compounds. Understanding their reactivity is a prerequisite for their use in various fields. Given their chemical diversity and significance, the behavior of AAs on surfaces is of considerable interest for potential applications. Herein, we combined scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) to explore the reactivity of AAs on silver (Ag) and gold (Au) surfaces using a gas-mediated reaction strategy. Our results revealed that oxidative dehydrogenation was readily achieved after O2-mediated treatment on Ag surfaces, leading to the formation of organometallic nanopores, while AAs remained unperturbed on Au(111), indicating a substrate-dependent behavior. Density functional theory (DFT) calculations corroborate the experimental observations, by simulated core-level shifts and microscopy images, and demonstrate how the choice of substrate dictates the thermodynamics of the overall reactions. These findings emphasize the importance V substrate selection in modulating the surface chemistry of AAs, paving the way for more efficient catalytic processes and material design.

Keywords:

aromatic amines

oxidative dehydroge-nation

gas-mediation

surface chemistry

scanning tunneling microscopy

Reactivity of Aromatic Amines Under O2 Exposure on Metal Surfaces

Abstract

Journal

Organization