Intermolecular Electronic Coupling of Organic Units for Efficient Persistent Room-Temperature Phosphorescence

被引：593

作者：

Yang, Zhiyong ^{[1
]}

Mao, Zhu ^{[1
]}

Zhang, Xuepeng ^{[2
]}

Ou, Depei ^{[1
]}

Mu, Yingxiao ^{[1
]}

Zhang, Yi ^{[1
]}

Zhao, Cunyuan ^{[2
]}

Liu, Siwei ^{[1
]}

Chi, Zhenguo ^{[1
]}

Xu, Jiarui ^{[1
]}

Wu, Yuan-Chun ^{[3
]}

Lu, Po-Yen ^{[3
]}

Lien, Alan ^{[3
]}

Bryce, Martin R. ^{[4
]}

机构：

[1] Sun Yat Sen Univ, Guangdong Engn Technol Res Ctr High Performance O, OEMT Sch Chem & Chem Engn, PCFM Lab,GDHPPC Lab,State Key Lab, Guangzhou 510275, Guangdong, Peoples R China

[2] Sun Yat Sen Univ, Sch Chem & Chem Engn, Guangzhou 510275, Guangdong, Peoples R China

[3] Shenzhen China Star Optoelect Technol Co Ltd, Shenzhen, Peoples R China

[4] Univ Durham, Dept Chem, Durham DH1 3LE, England

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2016年 / 55卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

intersystem crossing; organic materials; phosphorescence; photochemistry; spin-orbit coupling; LIGHT-EMITTING-DIODES; DELAYED FLUORESCENCE; DUAL-EMISSION; LUMINESCENCE; LUMINOGENS; CONVERSION; MOLECULE; STIMULI; STATES;

D O I：

10.1002/anie.201509224

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Although persistent room-temperature phosphorescence (RTP) emission has been observed for a few pure crystalline organic molecules, there is no consistent mechanism and no universal design strategy for organic persistent RTP (pRTP) materials. A new mechanism for pRTP is presented, based on combining the advantages of different excited-state configurations in coupled intermolecular units, which may be applicable to a wide range of organic molecules. By following this mechanism, we have developed a successful design strategy to obtain bright pRTP by utilizing a heavy halogen atom to further increase the intersystem crossing rate of the coupled units. RTP with a remarkably long lifetime of 0.28s and a very high quantum efficiency of 5% was thus obtained under ambient conditions. This strategy represents an important step in the understanding of organic pRTP emission.

引用

页码：2181 / 2185

页数：5

共 32 条

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