College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China.
College of Chemistry, Sichuan University, Chengdu, 610064, China.
Angew Chem Int Ed Engl. 2023 May 15;62(21):e202302011. doi: 10.1002/anie.202302011. Epub 2023 Apr 17.
Pt complexes have attracted a great deal of interest due to their rich phosphorescent properties. However, these square-planar Pt complexes are far more likely to encounter the problems of lack of metal-induced chirality and emission "aggregation-caused quenching". Herein, soft-bridged binuclear Pt 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.
Pt 配合物由于其丰富的磷光性质而引起了极大的关注。然而，这些平面正方形的 Pt 配合物更容易遇到缺乏金属诱导手性和发射“聚集猝灭”的问题。在此，合成并表征了具有金属诱导平面手性的软桥联双核 Pt 配合物。这些具有较小共轭体系的软桥联配体不仅有助于提高合成和对映体分离的溶解度，而且还可以从氨基酸中引入点手性，从而获得高效的非对映选择性。此外，通过软桥联配体可以很好地调节分子内 Pt-Pt 距离，从而首次通过缩短分子内 Pt-Pt 距离实现磷光量子产率高达 100%。这些配合物可用作高效溶液处理有机发光二极管中的发光体。
