Au108 S24 (PPh3 )16 : A Highly Symmetric Nanoscale Gold Cluster Confirms the General Concept of Metalloid Clusters

Sebastian Kenzler; Claudio Schrenk; Andreas Schnepf

doi:10.1002/anie.201609000

Au₁₀₈ S₂₄ (PPh₃ )₁₆ : A Highly Symmetric Nanoscale Gold Cluster Confirms the General Concept of Metalloid Clusters

Angew Chem Int Ed Engl. 2017 Jan 2;56(1):393-396. doi: 10.1002/anie.201609000. Epub 2016 Dec 9.

Authors

Sebastian Kenzler¹, Claudio Schrenk¹, Andreas Schnepf¹

Affiliation

¹ Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany.

PMID: 27936317
DOI: 10.1002/anie.201609000

Abstract

The reduction of (Ph₃ P)AuCl with NaBH₄ in the presence of HSC(SiMe₃ )₃ , leads to one of the largest metalloid gold clusters: Au₁₀₈ S₂₄ (PPh₃ )₁₆ (1). Within 1 an octahedral Au₄₄ core of gold atoms arranged as in Au metal is surrounded by 48 oxidized Au atoms of an Au₄₈ S₂₄ shell, a novel building block in gold chemistry. The protecting Au₄₈ S₂₄ shell is completed by additional 16 Au(PPh₃ ) units, leading to a complete protection of the gold core. Within 1 the Au-Au distances get more molecular on going from the center to the ligand shell. Cluster 1 represents novel structural motives in the field of metalloid gold clusters which also are partly typical for metal atoms in metalloid clusters: M_n R_m (n>m).

Keywords: gold; metalloid clusters; nanoparticles; thiol.

Publication types

Research Support, Non-U.S. Gov't