Luminescent (N∧C∧C) Gold(III) Complexes: Stabilized Gold(III) Fluorides

We report the design, synthesis, and application of a ((NCC)-C-boolean AND-C-boolean AND)-ligand framework able to stabilize highly electron-deprived gold(III) species. This novel platform enabled the preparation of C(sp(2))-gold(III) fluorides for the first time in monomeric, easy-to-handle, bench-stable form by a Cl/F ligand-exchange reaction. Devoid of oxidative conditions or stoichiometric use of toxic Hg salts, this method was applied to the preparation of multiple [C(sp(2))-AuIII-F] complexes, which were used as mechanistic probes for the study of the unique properties and intrinsic reactivity of Au[BOND]F bonds. The improved photophysical properties of [((NCC)-C-boolean AND-C-boolean AND)Au-III] complexes compared to classical pincer ((CNC)-N-boolean AND-C-boolean AND)-Au systems paves the way for the design of new late-transition-metal-based OLEDs.