Site-specific Doping of Silver Atoms into a Au Nanocluster As Directed by Ligand Binding Preferences

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 Jun 3

PMID 35655555

Authors

Wan-Qi Shi

Zong-Jie Guan

Jiao-Jiao Li

Xu-Shuang Han

Quan-Ming Wang

Affiliations

Soon will be listed here.

Abstract

For the first time site-specific doping of silver into a spherical Au nanocluster has been achieved in [AuAg(MeOPhS)(PPh)] (BF) (AuAg) through a dual-ligand coordination strategy. Single crystal X-ray structural analysis shows that the cluster has a distorted centered icosahedral Au@AuAg core of symmetry, in contrast to the Au@Au kernel in the well-known [Au(SR)] (R = CHCHPh). An interesting feature is the coexistence of [Au(SPhOMe)] dimeric staples and [P-Au-SPhOMe] semi-staples in the title cluster, due to the incorporation of PPh. The observation of only one double-charged peak in ESI-TOF-MS confirms the ordered doping of silver atoms. AuAg is a 6e system showing a distinct absorption spectrum from [Au(SR)], that is, the HOMO-LUMO transition of AuAg is optically forbidden due to the P character of the superatomic frontier orbitals.

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