Diversified AIE and mechanochromic luminescence based on carbazole derivative decorated dicyanovinyl groups: effects of substitution sites and molecular packing. Issue 12 (4th March 2020)

• Record Type: Journal Article
• Authors: Wang, Kai; Xiao, Hui; Qian, Li; Han, Mingxi; Wu, Xianfeng; Guo, Zhiyong; Zhan, Hongbing
• Is Part Of: CrystEngComm. Volume 22:Issue 12(2020)
• Page Start: 2166
• Page End: 2172
• Publication Date: 2020-03-04
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c9ce01958h
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Two positional isomers exhibited noticeable different luminescence properties, which were mainly attributed to their different molecular packing modes. 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.