Stable Monometallic Ir(I) complexes of Porphycene through β,β'-Bipyrrole Fusion

Iridium complexation was investigated for β-tetraisopropyldinaphthoporphycene. Use of 1,5-cyclooctadiene and dimethylformamide separately as solvents led to the formation of Ir(I) complex with COD as a secondary ligand, and an additional complex where COD is oxidized. These are the first examples of complexes of porphycene or its isomers, where in-core iridium is stabilized in +1 oxidation state without any carbonyl ligands. The latter complex found to be stable under aerobic conditions at elevated temperature. Details of synthesis, characterization and photophysical properties of the Ir(I) complexes are presented here.