[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]Cl₂1 exhibits two Au₄ units with Au–Au distances in the range from 295.4 pm to 335.1 pm. Crystals of 1 show 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.