“…This bears immediate consequence for research in bio-imaging 32,33 , photobiology 34 , photo-conversion 35,36 , as well as photoredox catalysis. 37 A drastic influence of the geometry of the connection between the two bipyridine parts of the bridging ligand was shown. Connection through the para position of the 2,2'-bipyridine, as in complex DP, increased the portion of absorbed visible light, as well as the molar absorption coefficient, and decreased the rate constants of direct (kdr + kdnr) and activated deactivation pathways (k3MC + k3MLCT).…”