Red‐Green‐Blue‐Yellow (RGBY) Magnetic Circularly Polarised Luminescence (MCPL) from Optically Inactive Phosphorescent Ir(III) Complexes

Abstract

AbstractThe development of phosphorescent organometallic molecules, capable of full‐colour circularly polarised luminescence with a controlled polarised sign in the absence of any chiral chemical influences, presents a significant scientific and engineering challenge. The current study describes the first red‐green‐blue‐yellow (RGBY) coloured, nearly mirror‐image magnetic circularly polarised luminescence (MCPL) in dimethyl sulfoxide and dichloromethane, from four optically inactive Iridium(III) complexes viz. Ir(III)(piq)3, Ir(III)(ppy)3, Ir(III)(F2‐ppy)2(pic), and Ir(III)(BT)2(acac), bearing achiral organic cyclometalated and ancillary ligands. The absolute value of the anisotropy factors, |gMCPL|, ranging from 0.9×10−3 to 2.5×10−3 in the presence of an external 1.6 T magnetic field was nearly identical to the enantiomerically pure Iridium (III) complexes at zero‐magnetic fields. Unexpectedly, when the same north‐up/south‐up Faraday geometries were used, the MCPL signs were inverted due to the achiral ligands.