Supramolecular assembly and solvochromic luminescence of a Au(I) complex containing di(4‐pyridylmethyl)aminedithiocarbamate

Abstract

AbstractThe di(4‐pyridylmethyl)aminedithiocarbamate (DPMACS2) ligand was used to react with (Me2S)AuCl to give a dinuclear complex, [Au(DPMACS2)]2, which shows both intramolecular Au(I)⋅⋅⋅Au(I) distances of 2.741(9)–2.788(1) Å and intermolecular Au(I)···Au(I) contacts of 2.917(5)–3.047(7) Å, leading to 1‐D Au(I) chains in the solid state. In addition, complex [Au(DPMACS2)]2 shows the luminescence at 555 nm at room temperature while excited, and almost no energy shift for the luminescence at 553 nm upon grinding has been observed. In this regard, we further examined the solvochromic luminescence upon grinding with various solvents, and the luminescence is within 549–572 nm. It is noted that the solvochromic luminescence for dichloromethane (566 nm) and 1,2‐dichloroethane (572 nm) has been observed, and the original luminescence at 555 nm can be restored upon solvent loss. Indeed, such red‐shifts for the solvochromic luminescence are most likely due to a decrease in intermolecular Au(I)⋅⋅⋅Au(I) contacts while solvents entering into crystal lattices upon grinding and it is a reversible process upon solvent loss.