Synthesis and luminescence properties of [Pt{4′-(Np1)-trpy}(CCPh)]SbF6 and [Pt{4′-(Np1)-trpy}{CC(CH2)2CH3}]SbF6 [4′-(Np1)-trpy=4′-(1-naphthyl)-2,2′:6′,2″-terpyridine]

The synthesis and characterisation of [Pt{4′-(Np1)-trpy}(C CPh)]SbF 6 ( 1 ) and [Pt{4′-(Np1)-trpy}{C C(CH 2 ) 2 CH 3 }]SbF 6 ( 2 ) [4′-(Np1)-trpy = 4′-(1-naphthyl)-2,2:6′,2′-terpyridine] are described. Complexes 1 and 2 exhibit unimolecular 3 MLCT (MLCT = metal-to-ligand charge transfer) emission in acetonitrile and in a low concentration 77 K glass solution in butyronitrile. The high concentration glass emission as well as the emission in the solid state is from a 3 MMLCT (MMLCT, metal–metal-to-ligand charge transfer) excited state, reflecting the presence of d z 2 ( Pt ) – d z 2 ( Pt ) interactions in these media.