Correlating electronic structures to electrochemiluminescence of cationic Ir complexes

Electrochemiluminescence (ECL) of heteroleptic cationic iridium complexes is correlated to their structures in order to get insight into tuning their emission wavelength and intensity. While the installation of fluorine and tert-butyl substituents on the ligands increases the electrochemical gap and promotes blue shifts in ECL emission, it reduces ECL efficiencies.