Bulk-Like Compressibility of the Au–Au Metallic Bond in the Atomically Precise Au<sub>25</sub> Cluster

Article Article scientifique Article Bulk-Like Compressibility of the Au–Au Metallic Bond in the Atomically Precise Au<sub>25</sub> Cluster eng 2026-09-09 2026-09-23 author Martin Sanchez Camino 0000-0003-3574-7748 405865 Chimie physique (groupe 3) (CHIF3) author Ahmed Ethmane Khadijetou 836881 author Giamboni Nicholas 0009-0008-3303-8984 900162 Chimie physique (groupe 3) (CHIF3) author Lawson Daku Latevi Max 0000-0003-1305-6807 530149 Département de chimie physique (CHIFI) author Besnard Céline 0000-0001-5699-9675 682138 Administration de la section de chimie (CHIAD) author Buergi Thomas 0000-0003-0906-082X 727741 Département de chimie physique (CHIFI) 12352-12358 10.1021/acs.nanolett.6c02846 1530-6984 https://pubs.acs.org/nalefd/article/26/37/12352/5426854/Bulk-Like-Compressibility-of-the-Au-Au-Metallic We present a high-pressure single-crystal X-ray diffraction study of the atomically precise Au25(PET)18q cluster (q = −1, 0) up to 10 GPa under strictly hydrostatic conditions. Our crystallographic analysis provides direct evidence of the pressure-induced phase transitions previously suggested by spectroscopic studies. Structural refinements reveal that the cluster accommodates compression through the reorganization of the flexible ligand shell and secondary distortions of the staple motifs, while the Au13 icosahedral core remains intact. Notably, the internal Au–Au distances exhibit a monotonic contraction that quantitatively mirrors the compressibility of bulk gold. This invariant rigidity at the sub-nanometer scale demonstrates that the fundamental stiffness of the metallic bond is preserved regardless of size. Our findings reconcile previous contradictions in the elasticity of metal nanostructures by isolating the intrinsic mechanical response of the Au kernel from extrinsic structural and experimental artifacts. Dewey 540 Swiss National Science Foundation Chiral monolayer-protected metal clusters: Sensing, catalysis and behavior at high pressure 214996 CH 38 Département de chimie physique 142 false 694 Groupe Bürgi Nano letters 26 37 400b58c3-762c-441c-8ad4-1d25eb45db59 Article (Published version) Restricted Article_scientifique_from_crossref.pdf 2437343 application/pdf 3a6b303e12e69e53433e8369ed7c0132b764b11211bdf6fabb6e38384693c3d1 restrictedAccess Faculté des sciences / Section de chimie et biochimie / Département de chimie physique

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Bulk-Like Compressibility of the Au–Au Metallic Bond in the Atomically Precise Au₂₅ Cluster	Nano letters			2026	4	0

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Giamboni, Nicholas