Ir(I)-carbonyl complexes of coumarinazoimidazoles: Synthesis structure, electrochemistry, photophysical properties and DFT calculations

► Ir(I)-CO complexes of 2-(coumaryl-6-azo)imidazole. ► Distorted square pyramidal geometry about Ir(I). ► Higher emission quantum yield of the complexes than the free ligands. ► The cyclic voltammetry shows metal oxidation and ligand reduction. ► DFT computations of the complexes interpret the solution spectra and the redox properties.