期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 4, 期 14, 页码 2901-2908出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc03299g
关键词
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资金
- key project of the Ministry of Science and Technology of China [2013CB834702]
- National Science Foundation of China [21490571, 21222402, 21174120]
- Research Grants Council of Hong Kong [16301614]
- Innovation and Technology Commission [ITC-CNERC14S01]
- Guangdong Innovative Research Team Program [201101C0105067115]
- Fundamental Research Funds for the Central Universities [2015ZY013]
Aggregation-induced emission (AIE) is a unique photo-physical phenomenon and has become an emerging and hot research area. With the enthusiastic efforts paid by researchers, hundreds of AIE-active luminogens (AIEgens) have been generated but heterocyclic AIEgens are rarely reported. Recently, we enriched the family of AIEgens and reported a pyrazine-based AIEgen of tetraphenylpyrazine (TPP), which could be facilely functionalized by a post-synthetic strategy. In this work, we further expanded the TPP-based AIE system by covalently attaching one, two or four electron-donating triphenylamine moieties to the TPP core via Suzuki coupling, and TPP-TPA, TPP-2TPA and TPP-4TPA were produced, respectively. Thanks to their donor-pi-acceptor structures, these luminogens exhibit multifunctional properties, such as excellent thermal stability (up to 504 degrees C), large molar absorptivity, bright emission in the solid state (quantum yields up to 35.2%), solvatochromism, and high two-photon absorption cross-sections (up to 480 GM). Furthermore, using TPP-TPA as the emitting layer, a triple-layer device was fabricated and a turn-on voltage, maximum luminance, current efficiency, power efficiency, and external quantum efficiency of 3.7 V, 17 459 cd m(-2), 5.49 cd A(-1), 3.18 lm W-1 and 2.88% were realized, respectively. These results indicate a huge potential to develop high-tech applications based on these TPP-based AIEgens.
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