EurJIC [ECMC]

Abstract:

In this study, water-soluble colloidal platinum nanoparticles (Pt NPs) have been stabilized with novel thiolated cyclodextrins (CD-SH) and their catalytic performance has been investigated. We varied the size of the CD cycle (α-CD/β-CD), the degree of thiolation (one or two thiol groups per CD), and the CD/Pt molar ratio (0.5; 0.2; 0.1; 0.05) to find the best performing water-soluble, air-stable hydrogenation catalyst. An organometallic approach for the Pt NP synthesis resulted in the formation of small well-dispersed NPs of 1–2 nm in size, as shown by TEM. XPS analysis confirmed the formation of a Pt−S interaction, rationalizing the strong NP stabilization by a small quantity of CD-SH, while preserving the NP catalytic properties. Only 0.1 equivalent of CD-SH was enough to obtain a promising hydrogenation activity with preserved stability of the colloidal dispersion. Performing catalysis in biphasic conditions allowed simple separation of the products and reuse of the catalyst five times without deactivation.

 

Graphical Abstract:

Colloidal water-soluble platinum nanoparticles have been synthesized using novel thiolated cyclodextrins as ligands. This system showed promising catalytic performance in biphasic hydrogenation of unsaturated carbon-carbon and carbon-oxygen bonds.

 

Reference:

Permethylated cyclodextrins with thiol groups as stabilizing agents for catalytic water-soluble platinum nanoparticles

Nataliia Marchenko, Sebastian Jung, Adeline Pham, Geordie Creste, Mucahit Aygün, Jérôme Esvan, Yannick Coppel, Piet W. N. M. van Leeuwen, Dominique Armspach, Simon Tricard

European Journal of Inorganic Chemistry, First published: 08 January 2025 (Open Access) - DOI:

https://doi.org/10.1002/ejic.202400776

 

Contact :

Dominique Armspach (équipe ECMC, Confinement Moléculaire et Catalyse), Institut de Chimie de Strasbourg, UMR 7177.