Abstract
Reaction of the diphosphanes P∼P [PPh(2)(C(6)H(4))(n)PPh(2) (n = 1-5) and PPh(2)C[triple bond, length as m-dash]C(C(6)H(4))C[triple bond, length as m-dash]CPPh(2)] with [AuX(tht)] (X = Cl, C(6)F(5)) in a 1 : 2 molar ratio affords dinuclear luminescent complexes of formula [(AuX)(2)(P∼P)]. The photoemissive properties of these complexes are mainly controlled by the presence of the diphosphane ligand, specifically by the phenylene spacers of the diphosphanes. At room temperature fluorescent (IL) processes dominate the emissions, both in solution and in the solid state. Frozen solutions or solids at 77 K display dual emissions or only one emission attributed to ligand to ligand charge transfer (LL'CT) transitions from the auxiliary ligand (L) to phenylene spacers of the diphosphane (L').
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