[Au8(TePh)4dppm2(Ph2PCHPPh2)2]Cl2 a water and air stable red-luminescent gold-tellurolate cluster with an excellent quantum yield

Abstract

From the reaction of LiTePh and dppm(AuCl)2 a water and air stable gold-tellurolate cluster featuring a novel core structure can be obtained in good yield. The cluster with the formula [Au8(TePh)4dppm2(Ph2PCHPPh2)2]Cl2 1 exhibits two Au4-units with Au Au distances in the range from 295.4 pm to 335.1 pm. Crystals of 1 show a red luminescence with a high stokes shift and an excellent quantum yield (Φ = 0.28), demonstrating that 1 is a promising red phosphor for pc-LED applications