Formation of a NIR emitting Ag34S3SBB20(CF3COO)62+ cluster from a hydride protected silver cluster
Recent reports showed that intercluster reaction is a new synthetic strategy to make alloy clusters. In this work, we have performed an intercluster reaction between silver clusters and produced a highly ionizable Ag-S type cluster, which made their formation examined by mass spectrometry. [Ag18(TPP)10H22]2+ (Ag18), a highly reactive hydride and phosphine protected silver cluster was used as sacrificial cluster in this synthesis. An intercluster reaction between Ag18 and smaller silver-chalcogenolate clusters (SCC) resulted in a new cluster, [Ag34S3SBB20(CF3COO)6]2+. Cluster showed NIR emission around 1100 nm. The cluster composition was confirmed by high-resolution electrospray ionization mass spectrometry (ESI MS), thermogravimetry (TGA), and X-ray photoelectron spectroscopy (XPS).