A Drastic Difference in Photoluminescent Behavior between Cysteinato and Penicillaminato Gold(III) Complexes with a Phenylpyridinato Ligand

Abstract

Abstract The reactions of [Au(ppy)Cl2] (Hppy: 2-phenylpyridine) with d-penicillamine (d-H2pen) and l-cysteine (l-H2cys) in a 1:1 ratio gave mononuclear gold(III) complexes, [Au(ppy)(d-pen-N,S)] and [Au(ppy)(l-cys-N,S)], respectively, which were both structurally characterized to have a square-planar cis(N)-CN2S geometry. While the l-cys complex was nonemissive, the d-pen complex was found to exhibit orange emission in the solid state.