2,2′-Bipyridines (bpy) are undoubtedly among the most widely used ligands in coordination and supramolecular chemistry. 1 and 2 In particular, the photophysical properties of their metal complexes are of special interest. It was shown in numerous studies that the transition metal bpy complexes find various applications: from catalysis 3 and photocatalysis 4 to chemosensors 5 and luminescent probes for biomolecular systems. 6 Among bipyridines, 5-aryl-2,2′- ...