Han Qian, Jiazhuang Tian, Xiaozhou Jiang, Bangcui Zhang, Xueliang Li, Yanhua Yang, Shulin Gao, Lin Shao, Fumin Li
To further explore the relationship between aryl substituents and mechanofluorochromic (MFC) behaviors, four salicylaldimine-based difluoroboron complexes (ts-Ph BF2 , ts-Ph-NA BF2 , ts-2NA BF2 , and ts-triphenylamine [TPA] BF2 ), including aromatic substituents with different steric hindrance effects, were designed and successfully synthesized. Four complexes with twisted molecular conformation displayed intramolecular charge transfer and aggregation-induced emission properties. Under external mechanical stimuli, the as-synthesized powders of ts-Ph BF2 , ts-Ph-NA BF2 , and ts-TPA BF2 exhibited redshift fluorescence emission behaviors, and ts-Ph BF2 and ts-TPA BF2 could be recovered to original shifts by fuming, but ts-Ph-NA BF2 displayed irreversible switching...
April 2024: Luminescence: the Journal of Biological and Chemical Luminescence