Exceptionally Stable Dimers and Trimers of Au 25 Clusters Linked with a Bidentate Dithiol: Synthesis, Structure and Chirality Study - Archive ouverte HAL
Article Dans Une Revue Angewandte Chemie International Edition Année : 2023

Exceptionally Stable Dimers and Trimers of Au 25 Clusters Linked with a Bidentate Dithiol: Synthesis, Structure and Chirality Study

Résumé

A bidentate chiral dithiol (diBINAS) is utilised to bridge Au 25 nanoclusters to form oligomers. Separation by size allows the isolation of fractions that are stable thanks to the bidentate nature of the linker. The structure of the products is elucidated by smallangle X-ray scattering and calculated using density functional theory. Additional structural details are studied by diffusion-ordered nuclear magnetic resonance spectroscopy, transmission electron microscopy and matrix-assisted laser desorption/ionization time of flight mass spectrometry. Significant changes in the optical properties are analysed by UV/Vis and fluorescence spectroscopies, with the latter demonstrating a strong emission enhancement. Furthermore, the emergent chiral characteristics are studied by circular dichroism. Due to the geometry constraints of the nanocluster assemblies, diBINAS can be regarded as a templating molecule, taking a step towards the directed selfassembly of metal clusters.
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Dates et versions

hal-04085048 , version 1 (28-04-2023)

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Michal Swierczewski, Fabrice Cousin, Ewa A Banach, Arnulf Rosspeintner, Latevi Max Lawson Daku, et al.. Exceptionally Stable Dimers and Trimers of Au 25 Clusters Linked with a Bidentate Dithiol: Synthesis, Structure and Chirality Study. Angewandte Chemie International Edition, 2023, 62 (16), pp.e202215746. ⟨10.1002/anie.202215746⟩. ⟨hal-04085048⟩
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