D-A Solid Emitter with Crowded and Remarkably Twisted Conformations Exhibiting Multifunctionality and Multicolor Mechanochromism

被引:124
作者
Gong, Yongyang [1 ]
Zhang, Yiren [1 ]
Yuan, Wang Zhang [1 ]
Sun, Jing Zhi [2 ]
Zhang, Yongming [1 ]
机构
[1] Shanghai Jiao Tong Univ, Shanghai Key Lab Elect Insulat & Thermal Ageing, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China
[2] Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
基金
美国国家科学基金会;
关键词
AGGREGATION-INDUCED EMISSION; INTRAMOLECULAR CHARGE-TRANSFER; HIGHLY-EFFICIENT; 2-PHOTON ABSORPTION; MOLECULAR MATERIALS; ELECTRON-TRANSFER; FLUORESCENCE; TETRAPHENYLETHENE; DESIGN; SINGLE;
D O I
10.1021/jp500556p
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Multifunctional and mechanochromic optoelectronic materials are of significant importance in both academic and technical aspects. In this contribution, a novel D A conjugate (AN2TPAN), consisting of arylamine and two triphenylacrylonitrile (TPAN) units, with sterically crowded and remarkably twisted conformations, has been carefully designed and synthesized. It shows typical intramolecular charge transfer, aggregation-induced emission, and aggregation-enhanced two-photon absorption characteristics. Moreover, it exhibits more than three emission colors in the solid state upon mechanical grinding. Such multicolor mechanochromism for solid emitters under mild conditions is rarely reported. A multilayer nondoped OLED device of AN2TPAN is fabricated and performs excellently, whose maximal current and external quantum efficiencies are as high as 10.7 cd/A and 3.3%, respectively. The multifunctionality and multicolor mechanochromism of AN2TPAN make it promising in optoelectronic applications.
引用
收藏
页码:10998 / 11005
页数:8
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