Abstract
The first luminescent rhenium(I)–gold(I) hetero organometallics, Re{phen Au(PPh 3)}(CO) 3Cl ( 3) and Re{(PPh 3)Au phen Au(PPh 3)}(CO) 3Cl ( 4), have been prepared using the gold(I) complex AuCl(PPh 3) (PPh 3 = triphenylphosphine) and the novel rhenium(I) complexes Re(phen H)(CO) 3Cl ( 5) (phen H = 3-ethynyl-1,10-phenanthroline) or Re(H phen H)(CO) 3Cl ( 6) (H phen H = 3,8-bis(ethynyl)-1,10-phenanthroline). All the present rhenium(I) complexes 3– 6 were revealed to possess a facial configuration ( fac-isomer) with respect to the three carbonyl ligands. The main frameworks for these new gold(I) organometallics were constructed by the Au–C σ-bonding (with the η 1-type coordination) between the ethynylphenanthrolines and the Au(I) phosphine unit. Re(I)–Au(I) heterometallics 3 and 4 have shown single phosphorescence from the 3MLCT excited state and this observation can be interpreted in terms of the efficient intramolecular energy transfer from the Au(I) unit to the Re(I) unit.
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