Synthesis and luminescence behaviour of mixed-metal rhenium(I)-copper(I) and -silver(I) alkynyl complexes.: X-Ray crystal structures of [{η2-Re(Co)3(bpy)(CCPh)}2Cu]PF6 and [{η2-Re(CO)3(bpy)(CCPH)}2Ag]PF6

Two mixed-metal rhenium(I)-copper(I) and -silver(I) alkynyl complexes, [{eta(2)-Re(CO)(3)(bpy)(C=CPh)}(2)Cu]PF6 1 and [{eta(2)-Re(CO)(3)(bpy)(C=CPh)}(2)Ag]PF6 2, have been synthesized and shown to exhibit rich luminescence behaviour; the X-ray crystal structures of both complexes have also been determined.