Synthesis and crystallographic investigation of two new neutral Ir(III) complexes bearing 6-(phenyl)phenanthridine ligands

Herein, we report two new iridium(III) complexes (1 and 2), featuring 6-(phenyl)phenanthridine derivatives as cyclometalating (C^N) ligands and pyridyl-triazole or pyridyl-pyrazole ancillary (L^X) ligands. The synthesis of the two compounds was performed by reaction of the 6-(phenyl)-phenanthridine chloro-bridged dimer with the pyridyl-triazole/pyridyl-pyrazole (L^X) ligand. Single crystals of both complexes (1 and 2) were grown and analyzed by X-ray diffraction. Full crystallographic characterization and comparison of 1 and 2 solid-state structures is reported. Spectroscopic characterization revealed similar emissive properties for 1 (λmax = 650 nm; τdeg = 1.43 μs, QYdeg = 11.6 %) and 2 (λmax = 660 nm; τdeg = 1.45 μs, QYdeg = 12.1 %).