Details

Autor(en) / Beteiligte

• Vergara, Sandra
• Lukes, Dylan A
• Martynowycz, Michael W
• Santiago, Ulises
• Plascencia-Villa, Germán
• Weiss, Simon C
• de la Cruz, M. Jason
• Black, David M
• Alvarez, Marcos M
• López-Lozano, Xochitl
• Barnes, Christopher O
• Lin, Guowu
• Weissker, Hans-Christian
• Whetten, Robert L
• Gonen, Tamir
• Yacaman, Miguel Jose
• Calero, Guillermo

Titel

MicroED Structure of Au146(p-MBA)57 at Subatomic Resolution Reveals a Twinned FCC Cluster

Ist Teil von

• The journal of physical chemistry letters, 2017-11, Vol.8 (22), p.5523-5530

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Solving the atomic structure of metallic clusters is fundamental to understanding their optical, electronic, and chemical properties. Herein we present the structure of the largest aqueous gold cluster, Au146(p-MBA)57 (p-MBA: para-mercaptobenzoic acid), solved by electron micro-diffraction (MicroED) to subatomic resolution (0.85 Å) and by X-ray diffraction at atomic resolution (1.3 Å). The 146 gold atoms may be decomposed into two constituent sets consisting of 119 core and 27 peripheral atoms. The core atoms are organized in a twinned FCC structure, whereas the surface gold atoms follow a C2 rotational symmetry about an axis bisecting the twinning plane. The protective layer of 57 p-MBAs fully encloses the cluster and comprises bridging, monomeric, and dimeric staple motifs. Au146(p-MBA)57 is the largest cluster observed exhibiting a bulk-like FCC structure as well as the smallest gold particle exhibiting a stacking fault.