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

Song, Jintong1; Zeng, Rui1; Xiao, Hui3; Ni, Hailiang1; Xu, Zong-Xiang3; Xiang, Haifeng2

2024-09-01

10.1007/s11426-024-2124-3

SCIENCE CHINA-CHEMISTRY   影响因子和分区

1674-7291

1869-1870

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 pi-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 concentration-dependent phosphorescence with quantum yield up to 86.4% and could be applied as emitters in highly efficient solution-processed organic light-emitting diodes to achieve luminance, luminance efficiency, power efficiency, external quantum efficiency, and asymmetry factor up to 8.94 x 103 cd m-2,41.9 cd A-1,18.8 lm W-1, 12.6% and 2.98 x 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-A-based organic dyes.

Pt(II) complexes organic light-emitting diodes circularly polarized phosphorescence axial chirality

SCI

英语

通讯

National Natural Science Foundation of China[21871192] ; Major Program of Guangdong Basic and Applied Research[2019B030302009]

Chemistry

Chemistry, Multidisciplinary

WOS:001319497600004

SCIENCE PRESS

Web of Science

1.Sichuan Normal Univ, Coll Chem & Mat Sci, Chengdu 610068, Peoples R China
2.Sichuan Univ, Coll Chem, Chengdu 610064, Peoples R China
3.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518000, Peoples R China

Song, Jintong,Zeng, Rui,Xiao, Hui,et al. Multicolor circularly polarized phosphorescence of axially chiral binuclear platinum(II) complexes[J]. SCIENCE CHINA-CHEMISTRY,2024.

Song, Jintong,Zeng, Rui,Xiao, Hui,Ni, Hailiang,Xu, Zong-Xiang,&Xiang, Haifeng.(2024).Multicolor circularly polarized phosphorescence of axially chiral binuclear platinum(II) complexes.SCIENCE CHINA-CHEMISTRY.

Song, Jintong,et al."Multicolor circularly polarized phosphorescence of axially chiral binuclear platinum(II) complexes".SCIENCE CHINA-CHEMISTRY (2024).