Synthesis and Spectroscopic Characterization of a Homologous Series of Iridium(III) Cyclometalated Complexes

This work investigates the synthesis, structural characterization, and photophysical properties of a homologous series of cyclometalated iridium(III) complexes of the general form [Ir(C^N)2(N^N)+, where C^N represents 2,3-diphenylquinoxaline based ligands and N^N is 1,10-phenanthroline. A systematic ligand design strategy was employed to evaluate the effect of para-substituted halogen groups (F, Cl, Br) on the electronic structure and emission behavior of the resulting complexes while maintainin