The First Successfully Synthesized and Characterized Indium Corrole: Tris(pentafluorophenyl)corrolatoindium(III)

Corroles are deeply coloured tetrapyrrole compounds with a conjugated 18π-electron aromatic ring system carrying one direct pyrrole–pyrrole linkage. Many metal complexes of corrole ligands have been successfully synthesized in the last decades, and both their molecular as well as their electrochemical and photophysical properties have been investigated. Although several metallocorroles with group 13 elements (B, Al and Ga) are very well characterized, attempts to investigate the corresponding corrole complexes of the heavier elements of this main group are still quite rare. Especially the synthesis of a stable indium corrole molecule has been tried many times, but until today these compounds have not been obtained successfully to be characterized properly. In this work, the preparation and characterization of stable 5,10,15-tris(pentafluorophenyl)corrolatoindium(III) derivatives has been achieved. These new indium corrole complexes obtained were fully and successfully characterized by relevant analytical techniques (NMR, HR-MS, UV-Vis, Fluorescence and FTIR), and their photophysical and electrochemical features were studied and investigated for the first time.