Role of Substitution on the Photophysical Properties of 5,5′-Diaryl-2,2′-bipyridine (bpy*) in [Ir(ppy)<sub>2</sub>(bpy*)]PF<sub>6</sub> Complexes: A Combined Experimental and Theoretical Study
6a−6g) is reported. These ligands were reacted with the dimer [(ppy)2IrCl]2 (ppyH = 2-phenylpyridine) and afforded, after subsequent counterion exchange, a new series of luminescent cationic heteroleptic iridium(III) complexes, [(ppy)2Ir(bpy*)]PF6 (8a−8g). These complexes were characterized by electrochemical and spectroscopic methods. The crystal structures of two of these complexes (8a and 8g) are reported