Synthesis and photophysics of dinuclear gold(I) thiolates of bis(diphenylphosphino)-alkyl- and -aryl-amines. Crystal structure of [Au2{Ph2PN(C6H11)PPh2}(SC6H4F-p)2]

Abstract

A series of luminescent dinuclear gold(I) thiolates, [Au₂{Ph₂PN(R)PPh₂}(SR′)₂](R = C₆H₁₁, R′= C₆H₄F-p, C₆H₄Cl-p, C₆H₄Me-p; R = Ph, R′= C₆H₄Me-p; R = Prⁿ, R′= C₆H₄Me-p; R = Prⁱ, R′= C₆H₄Me-p) have been synthesized and their photophysical properties studied. The crystal structure of [Au₂{Ph₂PN(C₆H₁₁)PPh₂}(SC₆H₄F-p)₂] has been determined. These complexes have been shown to exhibit low-energy emission at ca. 600 nm, attributed to a ligand-to-metal charge transfer (thiolate to Au^I) origin.