Design, syntheses and aggregation-induced emission properties of two new enlarged tetraarylethene-based luminogens

作者：Zhang, Zhao-Ming; Han, Fang -Fang; Zhang, Ran; Li, Nan; Ni, Zhong-Hai^*

来源：Tetrahedron Letters, 2016, 57(17): 1917-1920.

DOI：10.1016/j.tetlet.2016.03.071

• Enlarged pi-conjugation
• Synthesis
• Aggregation-induced emission
• Solid-state fluorescence

Two new enlarged tetraarylethene-based compounds in which biphenyl and 4,5,9,10-tetrahydropyrene cores connect multiple arylethene units have been synthesized through convenient synthetic procedures. The optical properties and electrochemical properties of the two compounds have been investigated. The two compounds possess high emission efficiency in solid state. Particularly, the absolute fluorescence quantum yield of 4,5,9,10-tetrahydropyrene-cored compound in a solid film is up to 44.1%. The emissions of the two compounds in solutions are very weak but they become strong emitters in solid state or in poor solvents, showing aggregation-induced emission (ME) characteristics. The two compounds exhibit high thermal stability with T-d above 427 degrees C and show relatively high glass transition temperature with T-g above 142 degrees C.

• 出版日期2016-4-27
• 单位中国矿业大学（北京）