Solid State EXAFS and Luminescence Studies of Neutral, Dinuclear Gold(I) Complexes. Gold(I)-Gold(I) Interactions in the Solid State

Luminescent Di‐ and Polynuclear Organometallic Gold(I)–Metal (Au2, {Au2Ag}n and {Au2Cu}n) Compounds Containing Bidentate Phosphanes as Active Antimicrobial Agents

“…Relaxation of the triplet excited state by radioactive decay would usually result in phosphorescence with large Stokes shifts. [1a] Since the first reports [4,5] on the photoluminescence of [Au 2 (μ-dppm) 2 ] 2+ , di and polynuclear gold(I) phosphane derivatives have been widely studied, [1,6] including organometallic compounds, [7] compounds with sulfur- [6g,n,8] and nitrogen-containing [9] ligands and chalcogenide centred gold derivatives. [10] In some cases the short gold(I)…gold(I) distances in these derivatives may not play a decisive role in determining the emission energy, as the auxiliary counter anion or solvent can dramatically affect their photophysical properties.…”

Ab initio Study on Luminescence and Aurophilicity of a Dinuclear [(AuPH3)2(i‐mnt)] Complex (i‐mnt = isomer‐Malononitriledithiolate)

“…[29,30] For Au I complexes containing both phosphane and thiolate ligands, the lower-energy emissions in the solid state have been experimentally attributed to AuǞthiolate charge transfer (MLCT). [11,17,24,31Ϫ36] Bruce's studies on a series of dinuclear (phosphane)Au I thiolates with or without AuϪAu interaction showed that the interaction is not a necessary condition for luminescence and that its presence does not significantly perturb the luminescence; [32] however, Fackler and co-workers found that the emission maximum in the luminescence of many mononuclear (phosphane)Au I thiolate complexes can be affected by an AuϪAu interaction. [11] In fact, such studies are not incompatible.…”

Organometallic complexes of transition metals in luminescent cell imaging applications

“…The mechanisms of emission from mononuclear species are complex, but many involve substantial Ligand to Metal Charge Transfer (LMCT) character [50]. However, dinuclear complexes which have goldegold distances small enough to allow aurophilic interactions can luminesce via a Ligand to MetaleMetal Charge Transfer (LMMCT) mechanism which can lead to a significantly red-shifted excitation and emission profile by comparison with the analogous mononuclear species [51].…”