More than Carbazole Derivatives Activate Room Temperature Ultralong Organic Phosphorescence of Benzoindole Derivatives

被引：120

作者：

Qian, Chen ^{[1
]}

Ma, Zhimin ^{[2
]}

Fu, Xiaohua ^{[1
]}

Zhang, Xue ^{[1
]}

Li, Zewei ^{[2
]}

Jin, Huiwen ^{[1
]}

Chen, Mingxing ^{[2
]}

Jiang, Hong ^{[2
]}

Jia, Xinru ^{[2
]}

Ma, Zhiyong ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, Coll Chem Engn, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China

[2] Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Key Lab Polymer Chem & Phys,Minist Educ, Beijing 100871, Peoples R China

来源：

ADVANCED MATERIALS | 2022年 / 34卷 / 19期

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

benzoindole derivative; guest-matrix doped system; high-resolution photoprinting; photo-activated ultralong organic phosphorescence; radical cation; COLOR;

D O I：

10.1002/adma.202200544

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The mechanism of carbazole (Cz)-based phosphors is still unclear since its isomer (1H-benzo[f]indole, Bd) is discovered in 2020. Herein, the successful synthesis of four Cz/Bd derivatives is reported, named as 2CzBr, CzBdBr, 2BdBr, and 3Bd, and the general mechanism for their ultralong organic phosphorescence (UOP) is provided. Bd and its derivatives give double groups of phosphorescence, including the short-wavelength phosphorescence with a short lifetime and the ultralong phosphorescence at long wavelengths, assigned to their neutral molecules and radical cations, respectively. Interestingly, the doped poly(methyl methacrylate) (PMMA) films of CzBdBr and 2BdBr show photo-activated ultralong phosphorescence at room temperature. The activation of Bd derivatives 'UOP involves three factors: 1) well dispersion in the matrix with limited amount, 2) generation of their radical cations and 3) the matrix-mediated stabilization of radical cations. The function of Cz derivatives to activate the Bd derivatives' UOP could be replaced by photo-activation or using other matrixes. Significantly, the application of the doped PMMA films is practiced and gives an exciting result that the high-resolution QR code could be reversibly printed and erased on the film. This research has expanded the understanding in the field of organic phosphorescence and it may pave a new way for its development.

引用

页数：11