1. Diversified AIE and mechanochromic luminescence based on carbazole derivative decorated dicyanovinyl groups: effects of substitution sites and molecular packing
- Author
-
Kai Wang, Hongbing Zhan, Li Qian, Xianfeng Wu, Hui Xiao, Zhiyong Guo, and Mingxi Han
- Subjects
Mechanochromic luminescence ,Quenching (fluorescence) ,Chemistry ,Carbazole ,Stacking ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Photochemistry ,01 natural sciences ,Fluorescence ,Carbazole derivative ,0104 chemical sciences ,chemistry.chemical_compound ,Structural isomer ,General Materials Science ,0210 nano-technology ,Luminescence - Abstract
Aggregation-induced emission (AIE) properties have been widely investigated not only because they thoroughly circumvent the notorious aggregation-caused quenching effect encountered in conventional fluorophores but also due to their promising applications in organic light-emitting diodes, fluorescent sensors and bioimaging. In this work, we reported a study of the molecular packing and luminescence properties of AIE active positional isomers (m-BPCDM and p-BPCDM) with carbazole and dicyanovinyl groups. The compound m-BPCDM based on meta-substitution showed more evident AIE processes than the compound p-BPCDM based on para-substitution, which can be attributed to the strong π–π stacking effect brought by the spatial structure of p-BPCDM. Moreover, the two positional isomers also exhibited distinct mechanochromic luminescence properties.
- Published
- 2020