Robust Enantiomeric Two-Dimensional Assembly of Atomically Precise Silver Clusters

摘要

The facile syntheses of enantiomeric atomically precise silver clusters starting from achiral ligands remain a substantial challenge to explore. In this work, a pair of atomically precise enantiomers of R/S-Ag17Cl­( i PrS)9S­(CH3COO)5H2O (R/S-Ag 17 , i PrS = isopropanethiolate) clusters have been synthesized using a viable solvothermal approach. The chirality of the resulting enantiomeric R/S-Ag 17 clusters is attributed to the asymmetric arrangement of surface achiral ligands. Both R/S-Ag 17 enantiomers could form the two-dimensional (2D) assemblies via intercluster interactions of basic building blocks containing Ag16S8 moieties, i PrS-Ag motifs, and S2– linkers. Such a small ligand-induced 2D assembly greatly contributes to the enhancement of thermal stability and photocatalytic activity of R/S-Ag 17 clusters, providing possibilities for exploring robust coinage cluster-based assembly with attractive catalytic properties.