title: Modulation of luminescence by subtle anion-cation and anion-π interactions in a trigonal Au(I)···Cu(I) complex.
abstract: The trigonally coordinated [AuCu(PPh(2)py)(3)](BF(4))(2) (1) crystallizes in two polymorphs and a pseudopolymorph, each of which contains a trigonally coordinated cation with short Au(I)-Cu(I) separations of ∼2.7 Å. Under UV illumination, these crystals luminesce different colors ranging from blue to yellow. The structures of these cations are nearly superimposable, and the primary difference resides in the relative placement of the anions and solvate molecules. As confirmed by time-dependent density functional theory calculations, it is these interactions that are responsible for the differential emission properties.
authors.affiliation: Department of Chemistry, University of Nevada, Reno, Nevada 89557, United States.
authors.forename: Kelly
authors.initials: K
authors.lastname: Chen
authors.forename: Christoph E
authors.initials: CE
authors.lastname: Strasser
authors.forename: Jennifer C
authors.initials: JC
authors.lastname: Schmitt
authors.forename: Jason
authors.initials: J
authors.lastname: Shearer
authors.forename: Vincent J
authors.initials: VJ
authors.lastname: Catalano