Metal‐Induced Planar Chirality of Soft‐Bridged Binuclear Platinum(II) Complexes: 100 % Phosphorescence Quantum Yields, Chiral Self‐Sorting, and Circularly Polarized Luminescence

Abstract

PtII complexes have attracted a great deal of interest due to their rich phosphorescent properties. However, these square‐planar PtII complexes are far more likely to encounter the problems of lack of metal‐induced chirality and emission “aggregation‐caused quenching”. Herein, soft‐bridged binuclear PtII complexes bearing metal‐induced planar chirality were synthesized and characterized. These soft bridging ligands with smaller conjugated system would help to not only improve solubility for synthesis and enantioseparation but also introduce point chirality from amino acid for highly efficient diastereoselectivity. Furthermore, the intramolecular Pt−Pt distances could be well regulated by soft bridging ligands, and consequently the phosphorescence quantum yield up to 100 % could be achieved by shortening intramolecular Pt−Pt distance for first time. These complexes can be used as emitters in highly efficient solution‐processed organic light‐emitting diodes.