A non-luminescent polymorph of [(cyclohexyl isocyanide)2Au]PF6 that becomes luminescent upon grinding or exposure to dichloromethane vapor

Abstract

The discovery of a third, non-luminescent crystalline polymorph of [(C₆H₁₁NC)₂Au]PF₆ is reported. Remarkably, crystals of this polymorph are sensitive to mechanical pressure or to exposure to dichloromethane vapor. In both cases, the conversion produces the yellow, green luminescent polymorph of [(C₆H₁₁NC)₂Au]PF₆ and not the colorless, blue luminescent polymorph.