title: Dinuclear gold(I) complexes with propylene bridged N-heterocyclic dicarbene ligands: synthesis, structures, and trends in reactivities and properties.
abstract: Four novel dinuclear N-heterocyclic dicarbene gold(I) complexes with a propylene linker between the carbene moieties have been synthesized and their luminescence and electrochemical properties, together with their reactivity towards bromine oxidative addition, have been screened. All the complexes emit in the solid state in the blue-green spectral range (400-500 nm) with appreciable intensities (Φ(em) up to ≈10%). In cyclic voltammetry, the Au(I)/Au(0) peak splits at low temperature into two separate peaks relative to the couples Au(I)-Au(I)/Au(I)-Au(0) and Au(I)-Au(0)/Au(0)-Au(0), thus indicating the presence of an Au···Au interaction in the dinuclear complex. Oxidative addition of bromine affords as a major or unique product Au(II)-Au(II) complexes most likely as a consequence of the interaction between the two gold centres favoured by the propylene linker.
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, 35131 Padova, Italy. cristina.tubaro@unipd.it
authors.forename: Cristina
authors.initials: C
authors.lastname: Tubaro
authors.forename: Marco
authors.initials: M
authors.lastname: Baron
authors.forename: Michele
authors.initials: M
authors.lastname: Costante
authors.forename: Marino
authors.initials: M
authors.lastname: Basato
authors.forename: Andrea
authors.initials: A
authors.lastname: Biffis
authors.forename: Armando
authors.initials: A
authors.lastname: Gennaro
authors.forename: Abdirisak Ahmed
authors.initials: AA
authors.lastname: Isse
authors.forename: Claudia
authors.initials: C
authors.lastname: Graiff
authors.forename: Gianluca
authors.initials: G
authors.lastname: Accorsi