This work presents the synthesis of poly(vinylpyrrolidone)-stabilized gold nanoparticles (Au NPs) and their subsequent functionalization with molecules bearing terminal alkynes. The ligand exchange occurs at the liquid–liquid interface (LLI), resulting in the formation of Au NPs stabilized through the covalent C–Au functionalization.
Simultaneously, structured composite films are formed, driven by the self-assembly of the Au NPs supported by the polymer. A comparative analysis involving three distinct alkyne-terminated derivatives reveals that film formation is favored when the ligand includes an aromatic unit such as in a ferrocenyl-stilbene derivative. The LLI films can be easily transferred to solid a support for their characterization. Additionally, it is demonstrated that these films serve as a potential electrocatalytic platform. As a proof of concept, we demonstrate that the electrochemically active ferrocene-based Au NPs films can efficiently remove methylene blue via an electro-Fenton-like reaction, surpassing the efficiency of the non-redox phenylacetylene Au NP films.
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M4ELC Sustainable Electronics
Redox-Active Au Nanoparticles Self-Assembled at Liquid–Liquid Interface via C–Au Functionalization for Dye Degradation Electrocatalysis
José Catalán-Toledo, Jamila Djafari, Marta Mas-Torrent, and Núria Crivillers*
ACS Appl. Nano Mater. 2024, 7, 5, 5242–5251
