Volume 62, Issue 21 e202302011
Research Article

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

Prof. Jintong Song

Corresponding Author

Prof. Jintong Song

College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068 China

College of Chemistry, Sichuan University, Chengdu, 610064 China

These authors contributed equally to this work.

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Hui Xiao

Hui Xiao

Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518000 China

These authors contributed equally to this work.

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Bao Zhang

Bao Zhang

College of Chemistry, Sichuan University, Chengdu, 610064 China

Contribution: Methodology (supporting)

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Lang Qu

Lang Qu

College of Chemistry, Sichuan University, Chengdu, 610064 China

Contribution: Methodology (supporting)

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Prof. Xiangge Zhou

Prof. Xiangge Zhou

College of Chemistry, Sichuan University, Chengdu, 610064 China

Contribution: Formal analysis (supporting)

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Prof. Ping Hu

Prof. Ping Hu

College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068 China

Contribution: Formal analysis (supporting)

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Prof. Zong-Xiang Xu

Corresponding Author

Prof. Zong-Xiang Xu

Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518000 China

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Prof. Haifeng Xiang

Corresponding Author

Prof. Haifeng Xiang

College of Chemistry, Sichuan University, Chengdu, 610064 China

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First published: 20 March 2023
Citations: 11

Graphical Abstract

Racemic (R)/(S) and enantiopure (D,R,D)/(L,S,L) binuclear PtII complexes with metal-induced planar chirality were designed and prepared by using soft-bridged achiral and chiral ligands, respectively. Their phosphorescence quantum yields up to 100 % can be achieved by shortening intramolecular Pt−Pt distance for highly efficient solution-processed circularly polarized OLEDs.

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.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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