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An intensely luminescent gold(I)-silver(I) cluster [(C)(AuPPhpy2)6Ag6(CF3CO2)3](BF4)5 (PPhpy2=bis(2-pyridyl)phenylphosphine) ( 3) is synthesized by the reaction of [(C)(AuPPhpy2)6Ag4](BF4)6 with AgCF3CO2. All eight faces of the octahedral C@Au6 core in 3 are capped, that is, six faces are capped by silver ions and two by tetrafluoroborates. Cluster 3 is intensely luminescent in solution with a quantum yield of 92 %. Ligation of CF3CO2− ions is vital for the construction and emission properties of 3, as confirmed by DFT calculations. BF4− ions are involved in the protecting sphere of the metal core, as evidenced by 19F NMR data. The participation of phosphines, CF3CO2−, and BF4− ions in the protection of the emissive core and the enhancement of the rigidity of the cluster result in the high emission efficiency. This is the first example of organic ligands and inorganic anions forming a rigid protecting sphere for luminescent coinage-metal clusters. [ABSTRACT FROM AUTHOR]

Kleine Anionen spielen eine große Rolle bei der Synthese stark lumineszierender Gold(I) ‐ Silber(I) ‐ Cluster. Q. ‐ M. Wang et al. zeigen in der Zuschrift auf S. 7223, dass ein Goldcluster durch stufenweise Anlagerung von Silberionen zunehmend starrer wird. Der Kern ist vollständig von organischen Liganden und anorganischen Anionen geschützt und verfügt über eine hoch effiziente Lichtemission. [ABSTRACT FROM AUTHOR]