8-Quinolinolates as Ligands for Luminescent Cyclometalated Iridium Complexes

Abstract

The synthesis, structure, and thermal, photophysical, and electroluminescent properties of bis(κ2(C2,N)-2-ppy)(κ2(N,O)-q)iridium(III) (ppy = phenylpyridine, q = 8-quinolinolate, 5-formyl-8-quinolinolate, or 5-nitro-8-quinolinolate) are described. The easily prepared compounds exhibit absorption and emission characteristics controlled by the quinolinolate ligand combined with increased thermal stability and enhanced OLED performance.