Exceptional aggregation-induced emission from one totally planar molecule. (November 2019)

• Record Type: Journal Article
• Authors: Yuan, Ying-Xue; Wu, Bai-Xing; Xiong, Jia-Bin; Zhang, Hong-Chao; Hu, Ming; Zheng, Yan-Song
• Is Part Of: Dyes and pigments. Volume 170(2019)
• Publication Date: 2019-11
• Subjects: AIE -- Planar molecule -- Intramolecular charge transfer -- Slipped π-π stacking -- A-D-A triad; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2019.107556
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Planar molecules usually display aggregation-caused quenching (ACQ). Here, it was found that a completely planar organic compound, 5, 7, 12, 14-tetraoxapentacene A-D-A triad with carbon-oxygen bonds, had no fluorescence in high polar solvents but emitted strong light in suspension and in solid state, showed typical AIE effect. One novel AIE mechanism was disclosed by molecular packing in crystal state. In addition, its exceptional AIE effect showed great potential applications in fluorescent thermometer and highly sensitive sensor for selective detection of nitrophenolic compounds. The detection limit for 2, 4, 6-trinitrophenol was low to 0.168 nM. Graphical abstract: Image 1 Highlights: A completely planar molecule displays aggregation-induced emission (AIE) effect. The AIE effect is due to repulsive force between oxygen atoms in different molecular plane. The planar fluorophore is beneficial for sensing explosives thanks to the bigger interaction area. The planar fluorophore can be used as fluorescent thermometer having intensity increase with temperature.