Multicolor circularly polarized phosphorescence of axially chiral binuclear platinum(Ⅱ) complexes  

作　　者：Jintong Song Rui Zeng Hui Xiao Hailiang Ni Zong-Xiang Xu Haifeng Xiang 

机构地区：[1]College of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610068,China [2]College of Chemistry,Sichuan University,Chengdu 610064,China [3]Department of Chemistry,Southern University of Science and Technology,Shenzhen 518000,China

出　　处：《Science China Chemistry》2024年第11期3757-3766,共10页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (21871192);the Major Program of Guangdong Basic and Applied Research (2019B030302009)。

摘　　要：D-A charge transfer, including through-bond charge transfer and through-space charge transfer between two different electron donors(D) and electron acceptors(A), is a fundamental and powerful tool to tune the optical properties of organic dyes. Herein,we demonstrate a unique strategy to tune phosphorescence and circularly polarized luminescence properties of axially chiral binuclear Pt(Ⅱ) complexes through long-range charge transfer, even though these molecules have two totally identical segments on either side of the chiral core. The presence of axial chirality would break not only the symmetry of molecular structure and π-conjugation system but also the symmetry of charge distribution for long-range charge transfer. These binaphthyl-based Pt(Ⅱ)complexes bearing coordinated atoms far away from chiral axis exhibit no Pt-Pt interactions but colorful concentrationdependent phosphorescence with quantum yield up to 86.4% and could be applied as emitters in highly efficient solutionprocessed organic light-emitting diodes to achieve luminance, luminance efficiency, power efficiency, external quantum efficiency, and asymmetry factor up to 8.94 × 10^(3)cd m^(-2), 41.9 cd A-1, 18.8 lm W^(-1), 12.6% and 2.98 × 10^(-3), respectively. Therefore,the present work affords a new and simple way to utilize the inherently asymmetric advantage of chirality for the design of D-Abased organic dyes.

关 键 词：Pt(Ⅱ)complexes organic light-emitting diodes circularly polarized phosphorescence axial chirality 

分 类 号：TN383.1[电子电信—物理电子学] O641.4[理学—物理化学]